Definition of pentyne in English:

pentyne

Pronunciation /ˈpɛntʌɪn/

noun

(also pentine)
Chemistry
  • Originally: any of a number of unsaturated hydrocarbons with the formula C₅ H₈. Now specifically: an alkyne with this formula, especially (also 1- "pentyne") the unbranched isomer CH≡CCH₂ CH₂ CH₃.

Origin

Late 19th century; earliest use found in Henry Watts (1815–1884), chemist. From penta- + -yne.