sesquiterpene: meaning, definition, pronunciation and examples
C2Technical/Scientific
Quick answer
What does “sesquiterpene” mean?
A class of terpenes consisting of three isoprene units, having the molecular formula C15H24.
Audio
Pronunciation
Definition
Meaning and Definition
A class of terpenes consisting of three isoprene units, having the molecular formula C15H24.
A naturally occurring organic compound found in many plants and some insects, often responsible for aromatic properties and used in perfumery, flavoring, and traditional medicine. Some sesquiterpenes have significant biological activity.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling and pronunciation are consistent.
Connotations
Purely technical/scientific term with no regional connotative differences.
Frequency
Equally rare in general discourse in both regions, confined to specialist fields.
Grammar
How to Use “sesquiterpene” in a Sentence
The [PLANT] produces [sesquiterpenes].[Sesquiterpene] [lactones] are known for their [PROPERTY].Analysis revealed the presence of [sesquiterpenes].Vocabulary
Collocations
Examples
Examples of “sesquiterpene” in a Sentence
adjective
British English
- The sesquiterpene profile of the oil was complex.
- Sesquiterpene biosynthesis is a key metabolic pathway.
American English
- The oil's sesquiterpene content was analyzed.
- Sesquiterpene synthases are fascinating enzymes.
Usage
Meaning in Context
Business
Rare, except in contexts of essential oil trading, perfumery, or phytopharmaceuticals.
Academic
Common in research papers and textbooks on organic chemistry, natural product chemistry, and plant biochemistry.
Everyday
Virtually never used.
Technical
Standard term in relevant scientific disciplines for describing a specific class of metabolites.
Vocabulary
Synonyms of “sesquiterpene”
Neutral
Weak
Vocabulary
Antonyms of “sesquiterpene”
Watch out
Common Mistakes When Using “sesquiterpene”
- Misspelling as 'sesquiterpine' or 'sesquiterpane'.
- Confusing it with 'sesquiterpenoid' (which includes oxygenated derivatives).
- Mispronouncing the 'sesqui' part as /ˈsɛskwi/ instead of /ˌsɛskwɪ/.
FAQ
Frequently Asked Questions
No, it is a highly specialized scientific term used primarily in chemistry, botany, and pharmacology.
Yes. Farnesol (found in rose and citronella oils) and bisabolol (found in chamomile) are common examples. The antimalarial drug artemisinin is a sesquiterpene lactone.
'Terpene' is a broad class of hydrocarbons built from isoprene units. 'Sesquiterpene' is a specific subclass built from exactly three isoprene units (15 carbon atoms).
It might appear on the ingredient list or in the marketing of high-end essential oils, aromatherapy products, or natural cosmetics, where specific compound classes are named to suggest purity or efficacy.
A class of terpenes consisting of three isoprene units, having the molecular formula C15H24.
Sesquiterpene is usually technical/scientific in register.
Sesquiterpene: in British English it is pronounced /ˌsɛskwɪˈtɜːpiːn/, and in American English it is pronounced /ˌsɛskwɪˈtɜːrpiːn/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think: 'SESqui' sounds like 'S' (for 15? No) but better: 'SES' for 'Semi-Extra-Small'? Not helpful. Remember: 'Sesqui' means 'one and a half'. A 'terpene' is a building block. A sesquiterpene is one and a half times bigger than the basic 10-carbon monoterpene.
Conceptual Metaphor
BUILDING BLOCKS: Terpenes are like Lego bricks (isoprene units). A sesquiterpene is a structure made of three such bricks.
Practice
Quiz
What does the prefix 'sesqui-' in 'sesquiterpene' indicate about its structure compared to a monoterpene?