
1) Chemical hydrocarbon 2) Component of resins 3) Hydrocarbon
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1) Limonene
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Terpenes (n {respell|TUR|peen}) are a large and diverse class of organic compounds, produced by a variety of plants, particularly conifers, though also by some insects such as termites or swallowtail butterflies, which emit terpenes from their osmeteria. They are often strong-smelling. They may protect the plants that produce them by deterring par...
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http://en.wikipedia.org/wiki/Terpene

• (n.) Any one of a series of isomeric hydrocarbons of pleasant aromatic odor, occurring especially in coniferous plants and represented by oil of turpentine, but including also certain hydrocarbons found in some essential oils.
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any of a class of hydrocarbons occurring widely in plants and animals and empirically regarded as built up from isoprene, a hydrocarbon consisting ... [4 related articles]
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http://www.britannica.com/eb/a-z/t/27

A type of strong-smelling chemical substance found in some plants, especially trees that have cones. Terpenes are found in essential oils (scented liquid taken from plants).
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http://www.cancer.gov/dictionary?expand=T

A hydrocarbon that is an oligomer or polymer of isoprene, or a derivative of these. Most terpenes are odorous liquids, reactive, and unstable, and are found in essential oils, especially turpentine. They contain double bonds and usually one or more rings. They include camphor, carotenoids, menthol, ...
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<plant biology> Lipid species, very abundant in plants. In principle terpenes are polymers of isoprene units. ... Function in plants is not clear. In animals dolichol, an important carrier species in the formation of glycoproteins, is a terpenoid. Similarly, squalene, an intermediate in the synthesis of cholesterol is a terpene. ... (13 Jan 1...
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(tur´pēn) any hydrocarbon of the formula C10H16.
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A class of hydrocarbons characterised by (C5H8)_ and occurring in plant oils and resins.
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Lipid species, very abundant in plants. In principle terpenes are polymers of isoprene units. Function in plants is not clear. In animals dolichol, an important carrier species in the formation of glycoproteins, is a terpenoid. Similarly squalene, an intermediate in the synthesis of cholesterol, is a terpene.
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Ter'pene noun [ See
Turpentine .]
(Chemistry) Any one of a series of isomeric hydrocarbons of pleasant aromatic odor, occurring especially in coniferous plants and represented by oil of turpentine, but including also certain hydrocarbons found in some essential oils.
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http://www.encyclo.co.uk/webster/T/30

Type: Term Pronunciation: ter′pēn Definitions: 1. One of a class of hydrocarbons with an empiric formula of C
10H
16, occurring in essential oils and resins. Acyclic terpenes may be regarded as isomers and polymers of isoprene units; cyclic forms include menthane, bornane, and camphene. Terpenes contai...
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http://www.medilexicon.com/medicaldictionary.php?t=90322

Terpene is a chemistry term for any of a large group of cyclic hydrocarbons which form the chief constituents of the volatile oils obtained by distilling plant material (Turpentine).
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[
n] - an unsaturated hydrocarbon obtained from plants
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http://www.webdictionary.co.uk/definition.php?query=terpene
noun an unsaturated hydrocarbon obtained from plants
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No exact match found.