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Any of a large class of organic compounds including terpenes, diterpenes, and sesquiterpenes. They have unsaturated molecules composed of linked isoprene units, generally having the formula (C₅H₈)n.
- ‘Many species endemic in Australia are known to synthesize and accumulate significant quantities of volatile terpenoids.’
- ‘Agents used in household cleaning compositions are composed of structurally diverse classes of chemicals, including surface active agents, phenols, and terpenoids.’
- ‘Because these terpenoids contain many functional groups - mainly unsaturated and saturated aldehydes and ketones - how they exert their antimicrobial activity is not well understood.’
- ‘The nectar is sucrose-dominant but also contains low concentrations of glucose, fructose, free amino acids and possibly terpenoids.’
- ‘However, the vast majority of terpenoids are classified as secondary metabolites, compounds not required for plant growth and development but presumed to have an ecological function in communication or defense.’
Denoting terpenoid compounds.
- ‘Tobacco was used as the host plant because it is an appropriate host for genetic engineering and its endogenous terpenoid metabolism has been well studied.’
- ‘In other plant-herbivore systems, the physical properties of the resins are determined by their terpenoid composition.’
- ‘Several other terpenoid compounds have been detected in the plant; some of these have been isolated and structurally characterized.’
- ‘Bursera species often produce complex mixtures containing many individual compounds, often belonging to several terpenoid types.’
- ‘The genus is notable for its terpenoid secretions and exudates that arise from a system of arborescent resin canals.’
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