See under (def 2).
(originally) any of a class of monocyclic hydrocarbons of the formula C 10 H 16 , obtained from plants.
this class or any of its oxygenated derivatives, any hydrocarbon from the same source having the formula C 5 H 8 (hemiterpene) the formula C 10 H 16 with an aliphatic structure (acyclic terpene) or two-ringed structure (bicyclic terpene) the formula C 15 H 24 (sesquiterpene) etc., and any of their oxygenated derivatives.
any one of a class of unsaturated hydrocarbons, such as the carotenes, that are found in the essential oils of many plants. Their molecules contain isoprene units and have the general formula (C5H8)n
terpene ter·pene (tûr’pēn’)
Any of various unsaturated hydrocarbons in essential oils and certain resins of plants and used in organic syntheses.
Any of a class of hydrocarbons consisting of two or more isoprene (C5H8) units joined together. Simple terpenes are found in the essential oils and resins of plants such as conifers. Turpentine, for example, is such an oil. More complex terpenes include vitamin A, carotenoid pigments (such as lycopene), squalene, and rubber. Terpenes are used in organic synthesis.
acycloguanosine acycloguanosine a·cy·clo·gua·no·sine (ā-sī’klō-gwä’nə-sēn’, -sĭn) n. See acyclovir.
a crystalline compound, C 18 H 11 N 5 O 3 , used as an antiviral drug in the treatment of herpes infections. acyclovir a·cy·clo·vir (ā-sī’klō-vǐr, -klə-) n. A synthetic purine nucleoside analog that is derived from guanine and is used topically in the treatment of herpes simplex infections, especially those of the genitals. Also […]
acyf Administration for Children, Youth, and Families
containing the . noun (modifier) of, denoting, or containing the monovalent group of atoms RCO-, where R is an organic group: acyl group or radical, acyl substitution an organometallic compound in which a metal atom is directly bound to an acyl group acyl ac·yl (ās’əl) n. A organic radical having the general formula RCO, derived […]