Chem. [short for acetylenyl, f. ACETYLENE + -YL.] A name for the univalent group C2H;=C=CH, = ACETYLENE minus one atom of hydrogen; as in Acetenyl-benzene C6H5—C=CH.
1877. Watts, Fownes’ Chem., II. 434. Acetenyl-benzene or Phenyl-acetylene … is an aromatic liquid, boiling at 140°.
