|a fool or simpleton; ninny.|
|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|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|
|[C19: terp- from obsolete terpentine|
terpene ter·pene (tûr'pēn')
Any of various unsaturated hydrocarbons in essential oils and certain resins of plants and used in organic syntheses.
|terpene (tûr'pēn') Pronunciation Key
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.