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Any of various unsaturated hydrocarbons, C10H16, found in essential oils and oleoresins of plants such as conifers and used in organic syntheses.

[Obsolete terp(entine), variant of turpentine + -ene.]

ter·pe′nic adj.
ter′pe·noid′ adj. & n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˈtɜːpəˌnɔid) chem
(Chemistry) a class of chemical compounds including all terpenes
(Chemistry) relating to terpenes
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Spatane diterpenoid from the tropical marine algae spatoglossum schmitti and Spatoglossum howleii (Dictyolaceae).
According to their chemical composition, this section is structured into three subdivisions: diterpenoid, triterpenoid and not (exclusively) terpenoid-based resins.
Ma, "Content determination of four diester diterpenoid alkaloids in leaves of Aconitum kusnezoffii by HPLC," China Journal of Chinese Materia Medica, vol.
Chen et al., "The cyanthin diterpenoid and sesterterpene constituents of Hericium erinaceus mycelium ameliorate Alzheimer's disease-related pathologies in APP/PS1 transgenic mice," International Journal of Molecular Sciences, vol.
cordifolia include phenolics, alkaloids, steroids, diterpenoid lactones, sesquiterpenoid, glycosides, polysaccharides, and aliphatic compounds.
Andrographolide ([C.sub.20][H.sub.30][O.sub.5], Figure 1), a labdane diterpenoid that is produced by Andrographis paniculata plant, has been reported to have several pharmacological properties, including antibacterial, antiviral, and antiplatelet properties, stimulation of cell differentiation, protection of the liver, being a cholagogue, antitumor properties, and immunoregulation [4].
Wang et al., "New diterpenoid alkaloids from Aconitum coreanum and their anti-arrhythmic effects on cardiac sodium current," Fitoterapia, vol.
[11] Stevioside, an abundant component of Stevia rebaudiana leaves, is a hydrophilic diterpenoid glycoside with relatively high molecular weight; therefore, it is unlikely to be absorbed in the intestine unless with the help of bacterial intestinal.