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.
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