(botany) That develops, matures or opens from the base towards the apex in sequence.
acrospire
acrospire
noun
(botany) The sprout at the end of a seed when it begins to germinate.
verb
To put forth the first sprout.
acrospore
acrospore
noun
A spore borne at the extremity of the cells of fructification in fungi.
addleplot
adelphous
adelphous
adj
(botany) Having coalescent or clustered filaments.
ademption
ademption
noun
(law) In the law of wills, the determination of what happens when property left under a will is no longer in the testator's estate when the testator dies.
adespoton
adipocele
adipocere
adipocere
noun
A brown, fatty, waxy substance (fatty acids) that forms on dead animal tissues in response to hydrolysis
adipocyte
adipocyte
noun
(cytology) a type of cell, present in adipose tissue, where fat is stored as a source of energy
adoperate
adoptable
adoptable
adj
Able to be adopted.
Desirable to adopt.
noun
(online gaming) A unique creature for a user to adopt.
A person or animal that is eligible to be adopted.
adoptedly
adoptedly
adv
In a manner of something adopted.
aegophony
aegophony
noun
Alternative form of egophony
aeolipile
aeolipile
noun
A steam engine powered by rocket propulsion due to escaping steam, consisting of a pressure vessel mounted on a bearing, with one or more tubes which exhaust steam tangentially to the rotation axis so as to create rotation.
aeolipyle
aeolipyle
noun
Alternative form of aeolipile
aepyceros
aepyornis
aerograph
aerograph
noun
A kind of airbrush.
aeropathy
aeropathy
noun
illness caused by a change in atmospheric pressure
aeropause
aeropause
noun
The region of the atmosphere above which it is not possible for aircraft to fly
aerophagy
aerophagy
noun
(medicine) the swallowing of air, especially in hysteria.
aerophane
aerophane
noun
A thin fabric resembling crape
aerophile
aerophile
noun
(biology) Any air-breathing organism.
One who has an interest in flying.
aerophone
aerophone
noun
(dated) A form of combined speaking trumpet and ear trumpet.
(dated) An instrument for greatly intensifying speech, consisting of a phonograph diaphragm arranged so that its action opens and closes valves, producing synchronous air blasts sufficient to operate a larger diaphragm with greater amplitude of vibration.
Any musical instrument which produces sound primarily by causing a body of air to vibrate, without the use of strings or membranes, and without the vibration of the instrument itself adding considerably to the sound.
aerophore
aerophore
noun
(botany) A thin-walled area of the roots of some plants growing in swampy conditions through which gasses are exchanged.
(historical) A nineteenth-century device with breathing tubes used by miners and workmen in areas that contain toxic fumes.
(historical) A predecessor of the radio, invented by Rene Homer in the early 1900s for communication between ships.
(medicine) Aerophore pulmonaire; a respirator for use with neonates and small animals developed by French obstetrician Gairal in 1879.
(underwater diving, historical) A predecessor of the aqualung, invented by Benoit Rouquayrol and Auguste Denayrouze 1865
aerophoto
aerophoto
noun
Alternative form of aerophotograph
aerophyte
aerophyte
noun
(biology) epiphyte
aeroplane
aeroplane
noun
(aeronautics, archaic) An airfoil.
A powered heavier-than-air aircraft with fixed wings.
Any of various nymphalid butterflies, of various genera, having a slow gliding flight. Also called planes.
verb
(intransitive) To fly in an aeroplane.
(transitive) To transport by aeroplane.
aeropulse
aeropulse
noun
pulsejet
aeroscope
aeroscope
noun
A device used to collect dust particles, spores etc from the air for subsequent analysis.
A type of compressed air camera for making films, constructed by Polish inventor Kazimierz Prószyński in 1909
aeroscopy
aeroscopy
noun
(obsolete, meteorology) The branch of meteorology that involves the scientific examination of the various properties and composition of the atmosphere, and their variation
(rare) divination by observation of the sky
(zoology) aeroscepsy
aerospace
aerospace
adj
Of, or relating to the Earth's atmosphere and nearby space.
Of, or relating to the science, technology and industry associated with aircraft, missiles, satellites and spacecraft.
noun
The atmosphere of the Earth and the region of space around it.
The industry concerned with aircraft, missiles, satellites and spacecraft.
aftercrop
aftercrop
noun
A second crop in the same year.
afterhope
agapemone
agapemone
Noun
The base of a religious sect established in Sussex by the Rev. Henry James Prince in the mid-19th century, or a successor establishment in London, which were associated with free love and polygamy.
Any community characterised by mutual love or free love.
agriotype
agriotype
noun
An ancestral wild form of a domestic animal or plant.
agrypnode
agueproof
agueproof
adj
Resistant to the ague.
alephzero
alepidote
alepidote
adj
(of a fish) not having scales
noun
A fish that has no scales
alispheno
alkaptone
allenport
allophane
allophane
noun
(mineralogy) An amorphous hydrous aluminium silicate clay mineral
allophite
allophone
allophone
adj
(Canada) Of or relating to those whose mother tongue is neither English, French, nor (sometimes) an indigenous language of Canada.
That which is of a language other than that spoken by the majority.
noun
(Canada) A person whose mother tongue is neither English, French, nor (sometimes) an indigenous language of Canada.
(phonology) Any of two or more alternative pronunciations for a phoneme.
A person whose mother tongue is one other than that spoken by the majority.
allophore
allophyle
allotrope
allotrope
noun
(chemistry) Any form of an element that has a distinctly different molecular structure to another form of the same element.
(linguistics) An other form, a different shape of a lexical unit.
(philosophy) An alternative shape of a cognitive structure.
allotypes
allotypes
noun
plural of allotype
alopecias
alopecias
noun
plural of alopecia
alopecist
alopecist
noun
One who undertakes to cure or prevent baldness.
alopecoid
alopecoid
adj
Similar to or resembling a fox.
noun
(zoology) An animal that resembles a fox.
alopiidae
alpasotes
alpenglow
alpenglow
noun
A rosy or reddish glow seen during sunset or sunrise on the summits of mountains, especially snow-covered mountains on the opposite side of the sun.
alpenhorn
alpenhorn
noun
Alternative spelling of alphorn
altiscope
altiscope
noun
An arrangement of lenses and mirrors making it possible to see around obstructing objects.
ambrotype
ambrotype
noun
(photography, historical) An early type of photograph in which a glass negative appears positive when displayed on a black background.
ametropia
ametropia
noun
(medicine) Any of several disorders of the eye (spherical or cylindrical) resulting from faulty refractive ability.
ametropic
ametropic
adj
(ophthalmology) Relating to or suffering from ametropia
amphibole
amphibole
noun
(mineralogy) Any of a large group of structurally similar hydrated double silicate minerals, containing various combinations of sodium, calcium, magnesium, iron, and aluminium/aluminum
amphicome
amphicome
Noun
A kind of figured stone, rugged and beset with eminences, anciently used in divination.
amphinome
amphogeny
ampholyte
ampholyte
noun
(chemistry) An amphoteric electrolyte
anapnoeic
anemopsis
aneuploid
aneuploid
adj
(genetics) Having a number of chromosomes that is not a multiple of the haploid number.
noun
A cell or an organism having such a number of chromosomes.
anglepods
anopheles
anopheles
noun
(entomology) Loose terminology for species in the Anopheles genus of mosquitoes, some of which may transmit various parasites, Plasmodium, that are the cause of malaria. More strictly speaking, as Anopheles is a proper name it should be capitalised.
antelopes
antelopes
noun
plural of antelope
anteporch
antipodes
antipodes
noun
(UK, now rare) Australia and New Zealand.
(figuratively, by extension) The opposite of something.
The Southern Hemisphere.
The place on the diametrically opposite side of the earth from a given point.
plural of antipode
antipoles
antipoles
noun
plural of antipole
antipopes
antipopes
noun
plural of antipope
antitrope
apeldoorn
apemosyne
aperiodic
aperiodic
adj
(mathematics, stochastic processes, of a state) for which any return to it may occur at irregular times; not periodic.
(physics) That does not have a periodic vibration
That does not recur periodically
apetaloid
apetaloid
adj
apetalous
apetalose
apetalose
adj
Alternative form of apetalous
apetalous
apetalous
adj
(botany) Having no petals.
aphidozer
aphidozer
noun
A device like a hopperdozer for the removal of aphids.
apholates
aphorised
aphorised
verb
simple past tense and past participle of aphorise
aphoriser
aphoriser
noun
An aphorist.
aphorises
aphorises
verb
Third-person singular simple present indicative form of aphorise
aphorized
aphorized
verb
simple past tense and past participle of aphorize
aphorizer
aphorizer
noun
Alternative form of aphoriser
aphorizes
aphorizes
verb
Third-person singular simple present indicative form of aphorize
aphrodite
aphrodite
noun
(mineralogy) A soft and earthy mineral of a white or yellowish color, and with a waxy lustre, found at Langbanshytta in Sweden. It is a hydrated silicate of magnesia, and resembles meerschaum.
aphrolite
aphyllose
aphyllose
adj
Alternative form of aphyllous
apiaceous
apiaceous
adj
(botany) Of or relating to the family Apiaceae, including the carrots.
apjohnite
apjohnite
noun
(mineralogy) A monoclinic-prismatic mineral containing aluminum, hydrogen, manganese, oxygen, and sulfur.
apneumona
apocenter
apocenter
noun
(astronomy) The furthest point of an astronomical object in an elliptical orbit to its center of attraction (the principal focus of the ellipse)
apocentre
apocentre
noun
Alternative form of apocenter
apocopate
apocopate
adj
Shortened by apocope; lacking a final sound or syllable
noun
A verb form of the prefix conjugation in Semitic which bears no final vowel and is considered the original perfective, but often called jussive mood.
verb
(linguistics) To shorten using apocope; to remove the final sound or syllable.
(linguistics, intransitive) To undergo apocope.
apocrenic
apodeipna
apodeixis
apodeixis
noun
Alternative form of apodixis
apodemata
apoenzyme
apoenzyme
noun
(biochemistry) An inactive haloenzyme lacking a cofactor.
apogamies
apogenous
apologete
apologiae
apologies
apologies
intj
Alternative form of my apologies
noun
A list of people unable to attend a meeting, typically presented as the first item on the agenda.
plural of apologie
plural of apology
apologise
apologise
verb
Non-Oxford British English standard spelling of apologize.
apologize
apologize
verb
(intransitive) To express regret that a certain event has occurred.
(intransitive, dated) To make an apologia or defense; to act as apologist.
(intransitive, often followed by “for”) To make an apology or excuse; to acknowledge some fault or offense, with expression of regret for it, by way of amends
apologues
apologues
noun
plural of apologue
apophlegm
apophyges
apophyges
noun
plural of apophyge
apophyses
apophyses
noun
plural of apophyse
aporphine
aporphine
noun
(organic chemistry) One of a class of quinoline alkaloids from which apomorphine can be derived.
aporrhoea
aportoise
aposelene
aposelene
noun
Apoapsis around the moon.
apostates
apostates
noun
plural of apostate
aposthume
apostille
apostille
noun
A special sign established in 1961 for certifying foreign documents.
verb
To authenticate an official document in accordance with the Apostille Convention.
apostoile
apotelesm
apotelesm
noun
(astrology, obsolete) The calculation and explanation of a horoscope.
apothecal
apothecal
adj
Relating to drugs or pharmacy.
apotheces
apothecia
apothecia
noun
plural of apothecium
apothegms
apothegms
noun
plural of apothegm
apotheose
apothesis
apothesis
noun
(architecture) A place on the south side of the chancel in primitive churches, furnished with shelves, for books, vestments, etc.
A dressing room connected with a public bath.
apozymase
appellors
appledorf
applejohn
applejohn
noun
(obsolete) A variety of apple which can be kept for a long period, gradually becoming dry and withered; known today as the French crab.
appleroot
applewood
applewood
Noun
The wood of the apple tree.
applosive
applosive
noun
(phonology) An unreleased plosive, denoted ◌̚ in the IPA.
appointed
appointed
adj
(of a politician or a title) Subject to appointment, as opposed to an election.
verb
simple past tense and past participle of appoint.
appointee
appointee
noun
a person who is appointed
appointer
appointer
noun
A person who appoints (in any sense).
apposable
apposable
adj
(anatomy) Capable of being apposed, or applied one to another, as the thumb to the fingers of the hand; able to be brought into direct spatial opposition.
appressor
approbate
approbate
adj
Approved.
verb
(transitive) To give official sanction, consent or authorization to.
approvers
approvers
noun
plural of approver
apronless
apronless
adj
Without an apron.
apronlike
apronlike
adj
Resembling an apron.
aprosexia
aprosexia
noun
(psychology) Inability to concentrate.
apsidiole
apsidiole
noun
Alternative form of apsidole
apyrotype
aquascope
aquascope
noun
A device used to view beneath the surface of water