(organic chemistry) A xanthophyll pigment (a hydroxy derivative of carotene) that occurs widely in nature.
cytopharynxes
cytopharynxes
noun
plural of cytopharynx
erythroxyline
erythroxyline
noun
(dated) The cocaine alkaloid.
hydroxyketone
hydroxyketone
noun
(organic chemistry) Any hydroxy derivative of a ketone; a ketone with hydroxy group bonded to it.
hydroxylamine
hydroxylamine
noun
(inorganic chemistry) An explosive inorganic derivative of ammonia, NH₂OH, used as a reducing agent, and in organic synthesis.
(organic chemistry) Any organic derivative of this compound.
hydroxylation
hydroxylation
noun
(organic chemistry) The introduction of a hydroxyl group into a molecule, especially by the replacement of a hydrogen atom
hypopharynxes
hypopharynxes
noun
plural of hypopharynx
myxochondroma
myxochondroma
noun
An unusual benign tumor of cartilaginous skeletal tissues (bones, ligaments, and tendons) that is a type of chondroma with myxoid (mucoid) degeneration of chondrocytes.
nasopharynxes
nasopharynxes
noun
plural of nasopharynx
nonorthodoxly
onychorrhexis
onychorrhexis
noun
(pathology) fingernail and toenail brittleness and breakage, such as may be due to excessive strong soap and water exposure, nail polish remover, hypothyroidism, anemia, anorexia nervosa or bulimia, or after oral retinoid therapy.
orthopyroxene
orthopyroxene
noun
(mineralogy) Any pyroxene that forms orthorhombic crystals.
