HCO

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Formyl \For"myl\, n. [Formic + -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}.
         [1913 Webster]