Etymograph

English

formylium

From formyl + -ium.

Formed from formyl + -ium

Latin formīca ‘ant’

English formyl

Today it means

noun A positively-charged cation with the formula HCO⁺, related to formaldehyde, aldehydes, and formyl.

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

Etymograph / formylium