English
heptacosene
From hepta- + -cos- + -ene.
Formed from hepta- + -cos- + -ene
Proto-Indo-European *septḿ̥ ‘seven’
Proto-Hellenic *heptə́ ‘seven’
Ancient Greek ἑπτά ‘seven’
English hepta-
Today it means
noun Any unsaturated aliphatic hydrocarbon that has twenty-seven carbon atoms and one double bond
Language periods are conventional ranges, not dates for this word.
Etymograph / heptacosene