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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 ?
"Face Value" (page 34) challenges teen-agers to work on vellum, creating portraits with a unique textural "feel." These kids show off talent for shading and modeling with ebony pencils and sanguine conte, artistically mixed with well-planned sweeps of turpenoid.
Department of Agriculture in Gainesville, Florida, corn emits a distress chemical, or turpenoid, when it senses caterpillar saliva.
"MFW has been in the industry for over 150 years and is well-known for its outstanding artist color formulations and mediums; Permalba artist oil color and its Turpenoid branded oil paint thinners.
The tools are mixed-media: sanguine conte in a pencil form, ebony pencil, and turpenoid (the vehicle).
For example, if a bug chews on the leaves, the plant releases a series of signaling chemicals called Turpenoids. The release of these chemicals provide evidence that the plants are being subjected to some type of threatening stimuli.