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hco


hco


  1  definition  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  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}.