Etymograph

English

isononyl

From iso- + nonyl.

Formed from iso- + nonyl

Ancient Greek ἴσος ‘equal’

English iso-

Today it means

noun Any of several branched-chain isomers of the nonyl radical, but especially 3,5,5-trimethyl pentyl

Language periods are conventional ranges, not dates for this word.

Etymograph / isononyl