Chem. [f. ACE[TIC] + NAPHTHENE.] A compound substance of the Naphthalene group, C12H10,=C10H6 < CH2/CH2, or naphthalene with two atoms of H replaced by divalent ethene (C2H4)″.
1877. Watts, Fownes’ Chem., II. 581. Acenaphthene … crystallises from fusion in flat prisms, from alcohol in long needles.
