(chemistry) To react with acetic acid or one of its derivatives; to introduce one or more acetyl groups into a substance
acetylene
acetylene
noun
(organic chemistry, countable) Any organic compound having one or more carbon–carbon triple bonds; an alkyne.
(organic chemistry, uncountable) Ethyne; the simplest alkyne, a hydrocarbon of formula HC≡CH. It is a colourless, odorless, extremely flammable, explosive gas, formerly used as an illuminating gas, but now used in welding and metallurgy.
A lamp powered by acetylene, particularly a motor vehicle headlight.
acetylide
acetylide
noun
(organic chemistry) Any organic compound derived from acetylene or a terminal acetylene by replacing a hydrogen atom with a metal.
acetylize
acetylize
verb
Synonym of acetylate
achaetous
achaetous
adj
(zoology) Without setae
achetidae
achordata
achordate
achordate
adj
(biology) Not having a proto-spinal chord at any stage of development.
achromate
achromats
achromats
noun
plural of achromat
aciculate
aciculate
adj
Furnished with aciculae.
Marked with fine irregular streaks as if scratched by a needle.
acicular (needle-shaped)
acidities
acidities
noun
plural of acidity
acidulant
acidulant
noun
A food additive used to increase acidity or to give a tart taste
acidulate
acidulate
verb
(transitive) To make slightly or moderately acid; to acidify.
(transitive) To make sour in a moderate degree; to sour somewhat.
(transitive) To use an acidic catalyst, with the chemical change being emphasised over the importance of the change in pH. Used in the processing of biodiesel co-products.
acidulent
acidulent
adj
Having an acid quality; sour; acidulous.
acierated
acierated
verb
simple past tense and past participle of acierate
acierates
acierates
verb
Third-person singular simple present indicative form of acierate
aciliated
aciliated
adj
Alternative form of aciliate
acinacity
acinetina
acoemetae
acoemetae
Noun
An order of fifth-century monks who, by turns, kept up a divine service day and night.
acoemetic
acoemetic
adj
Relating to, or characteristic of the Acoemetae
acoluthic
acoluthic
adj
Pertaining to a residual sense impression immediately following a stimulus, as with an afterimage
aconative
aconative
adj
Lacking conation
aconitine
aconitine
noun
(organic chemistry) An intensely poisonous alkaloid, extracted from aconite
aconitums
aconitums
noun
plural of aconitum
acoumeter
acoumeter
noun
(physics) An instrument for measuring the acuteness of the sense of hearing.
acoumetry
acoumetry
noun
The measuring of the power or extent of hearing.
acousmata
acousmata
noun
plural of acousma
acoustics
acoustics
noun
(physics) The science of sounds, teaching their nature, phenomena and laws.
plural of acoustic
acquaints
acquaints
verb
Third-person singular simple present indicative form of acquaint
acquisita
acquisite
acquisite
adj
(obsolete) acquired
acquittal
acquittal
noun
(historical) The act of releasing someone from debt or other obligation; acquittance.
(law) A legal decision that someone is not guilty with which they have been charged, or the formal dismissal of a charge by some other legal process.
(now rare) The act of fulfilling the duties (of a given role, obligation etc.).
(rare) Avoidance of danger; deliverance.
Payment of a debt or other obligation; reparations, amends.
acquitted
acquitted
adj
Having been acquitted; having gone through a trial that resulted in something other than a guilty verdict.
verb
simple past tense and past participle of acquit
acquitter
acquitter
noun
One who acquits or releases.
acraniate
acraniate
adj
That lacks a cranium
noun
Any animal of the class Acrania
acrestaff
acritical
acritical
adj
Not critical
Not involving a crisis
acroamata
acroamata
noun
plural of acroama
acrobates
acrobatic
acrobatic
adj
Of or pertaining to an acrobat.
vigorously active
acroblast
acroblast
noun
(medicine) Material derived from the Golgi apparatus from which the acrosome develops during spermatogenesis.
(medicine, archaic) A type of embryonic cell forming a layer external to the mesoblast.
acrodonts
acrodonts
noun
plural of acrodont
acroliths
acroliths
noun
plural of acrolith
acrometer
acronycta
acropathy
acropathy
noun
Any disease specific to the extremities.
acropetal
acropetal
adj
(botany) That develops, matures or opens from the base towards the apex in sequence.
acrostics
acrostics
noun
plural of acrostic
acroteral
acroteria
acroteria
noun
plural of acroterium
acroteric
acroteric
adj
Relating to the extremities of the limbs or to the tip of the nose
acrotisms
acrotreta
acrylates
acrylates
noun
plural of acrylate
actinally
actinally
adv
In an actinal manner.
actinians
actinians
noun
plural of actinian
actinical
actinides
actinides
noun
plural of actinide
actinidia
actinisms
actinisms
noun
plural of actinism
actiniums
actiniums
noun
plural of actinium
actinoida
actinoids
actinoids
noun
plural of actinoid
actinopod
actinopod
noun
(zoology) Any member of the variously ranked group Actinopoda of protozoa.
actinozoa
actinozoa
noun
plural of actinozoon
actinulae
actinulae
noun
plural of actinula
actionary
actionary
noun
(business, obsolete) A shareholder in a joint-stock company.
actionist
actionist
noun
(art, sometimes capitalized) One taking part in the actionism movement.
Synonym of activist
actionize
actionize
verb
(transitive, rare) To bring a legal action against; to sue.
actipylea
activable
activable
adj
Capable of being activated
activated
activated
verb
simple past tense and past participle of activate
activates
activates
verb
Third-person singular simple present indicative form of activate
activator
activator
noun
(biology) A type of effector that increases the rate of enzyme-mediated reactions.
(biology) Any chemical or agent which regulates one or more genes by increasing the rate of transcription.
(chemistry) Something that activates a catalyst
(mining) An agent that enables the flotation of a mineral or minerals.
A type of dopant used in phosphors and scintillators.
One who, or that which, activates.
activisms
activisms
noun
plural of activism
activists
activists
noun
plural of activist
activital
activital
adj
Relating to activity, especially (anthropology) the complex activities of human beings within a culture.
activized
activized
verb
simple past tense and past participle of activize
actoridae
actorship
actorship
noun
The state or quality associated with being an actor.
actresses
actresses
noun
plural of actress
actualise
actualise
verb
Non-Oxford British English standard spelling of actualize.
actualism
actualism
noun
(philosophy) The belief that actuality and existence are co‐extensive: i.e., that only actual things exist, and merely possible things do not.
actualist
actualist
noun
A proponent of actualism.
actuality
actuality
noun
(historical, film) A short early motion picture.
(television) Live reporting on current affairs.
An instance or quality of being actual or factual; fact.
The state of existing; existence.
actualize
actualize
verb
(intransitive) To become actual or real.
(reflexive) To realize one's full potential.
(transitive) To make real; to realize.
actuarial
actuarial
adj
Of or pertaining to actuaries.
Relating to statistical calculation, especially pertaining to insurance.
actuarian
actuarian
adj
Synonym of actuarial
noun
Synonym of actuary
actuaries
actuaries
noun
plural of actuary
actuating
actuating
verb
present participle of actuate
actuation
actuation
noun
The act of putting into motion.
actuators
actuators
noun
plural of actuator
acuductor
aculeated
aculeated
adj
(figurative) Pungent, incisive.
Having a sharp point; armed with prickles.
acuminate
acuminate
adj
(botany, mycology) Tapering to a long point in concave manner at its apex.
Tapering to a point; pointed.
verb
(intransitive) To end in or come to a sharp point.
(transitive) To render sharp or keen; to sharpen.
acurative
acusector
acutances
acutances
noun
plural of acutance
acuteness
acuteness
noun
(medicine) Violence of a disease, which brings it speedily to a crisis.
(of the senses or feelings) The faculty of precise discernment or perception; sensitiveness
Shrewdness, quickness of mind
Shrillness; high pitch; – said of sounds.
The quality of being acute or pointed
acutiator
acylating
acylating
verb
present participle of acylate
acylation
acylation
noun
(organic chemistry) The process of adding an acyl group to a compound.
adactylia
adactylia
noun
Alternative form of adactyly
adagietto
adagietto
adv
(music) More lighthearted than adagio.
noun
(music) A tempo mark directing that a passage is to be played slightly faster than adagio.
adamantly
adamantly
adv
In an immovable or inflexible manner.
adamastor
adamastor
noun
A hideous phantom
adamitism
adamitism
noun
Rare form of Adamitism.
adamsites
adamstown
adamstown
Proper noun
The capital and only settlement of the
A village in Ireland
A in Maryland.
A borough in Pennsylvania.
adaptable
adaptable
adj
Capable of adapting or of being adapted.
adaptably
adaptably
adv
In an adaptable manner.
adaptions
adaptions
noun
plural of adaption
adderbolt
adderbolt
noun
(now UK dialectal) A dragonfly.
adderspit
adderwort
adderwort
noun
Common bistort (Bistorta officinalis, syn. Persicaria bistorta) or snakeweed.
addicting
addicting
adj
(US) Causing addiction.
verb
present participle of addict
addiction
addiction
noun
(medicine) A state that is characterized by compulsive drug use or compulsive engagement in rewarding behavior, despite negative consequences.
A habit or practice that damages, jeopardizes or shortens one's life but when ceased causes trauma.
A pathological relationship to mood altering experience that has life damaging consequences.
The state of being addicted; devotion; inclination.
addictive
addictive
adj
Causing or tending to cause addiction; habit-forming.
Characterized by or susceptible to addiction.
Enjoyable.
noun
A drug that causes an addiction.
Anything that is very habit-forming.
addington
additions
additions
noun
plural of addition
additives
additives
noun
plural of additive
addlement
addlement
noun
confusion; an addled state
addlepate
addlepate
noun
Alternative form of addle pate
addleplot
adducting
adducting
verb
present participle of adduct
adduction
adduction
noun
(anatomy) The action by which the parts of the body are drawn towards its axis; -- opposed to abduction.
The act of adducing or bringing forward.
adductive
adductive
adj
Adducing, or bringing towards or to something.
adductors
adductors
noun
plural of adductor
adelaster
adelaster
noun
(botany) A provisional name for a plant which has not had its flowers botanically examined, and therefore has not been referred to its proper genus.
ademonist
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.
adenocyst
adenomata
adenomata
noun
plural of adenoma
adenotome
adenotomy
adenotomy
noun
(anatomy, surgery) Dissection of, or incision into, a gland or glands.
adeodatus
adeptness
adeptness
noun
The quality of being adept.
adeptship
adeptship
noun
The role or status of an adept.
adespoton
adfiliate
adherents
adherents
noun
plural of adherent
adhibited
adhibited
verb
simple past tense and past participle of adhibit
adiabatic
adiabatic
adj
(physics, quantum mechanics, of a process) That involves the slow change of the Hamiltonian of a system from its initial value to a final value.
(physics, thermodynamics, of a process) That occurs without gain or loss of heat (and thus with no change in entropy, in the quasistatic approximation).
noun
An adiabatic curve or graph
adigranth
adipocyte
adipocyte
noun
(cytology) a type of cell, present in adipose tissue, where fat is stored as a source of energy
adipomata
adiposity
adiposity
noun
Obesity; the state of being fat.
The condition of being adipose; adipose tissue.
adjection
adjection
noun
Act of adjecting or adding, or the thing added.
adjective
adjective
adj
(chemistry, of a dye) Needing the use of a mordant to be made fast to that which is being dyed.
(grammar) Adjectival; pertaining to or functioning as an adjective.
(law) Applying to methods of enforcement and rules of procedure.
(obsolete, reflected in the chemical sense, but extinct as a general sense) Incapable of independent function.
noun
(grammar) A word that modifies a noun or noun phrase or describes a noun’s referent.
(obsolete) A dependent; an accessory.
verb
(transitive) To make an adjective of; to form or convert into an adjective.
(transitive, chiefly as a participle) To characterize with an adjective; to describe by using an adjective.