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Webster 1913 Edition

Noun.

[

Form

ic +

-yl

(Chem.)

(a)

A univalent radical,

H.C:O

, regarded as the essential residue of formic acid and aldehyde.

(b)

Formerly, the radical methyl,

CH3

formyl ‎(plural formyls)

(organic chemistry) The univalent radical -CHO, derived from formaldehyde, that is characteristic of aldehydes

-CHO