ACRO or ACRON, HELENIUS, Roman grammarian, probably flourished at the end of the 2nd century A.D. He wrote commentaries on Terence and perhaps Persius. A collection of scholia on Horace was wrongly attributed to him.
See Pseudoacronis Scholia in Horatium Vetustiora, ed. 0. Keller. ACROLITHS, statues of a transition period in the history of plastic art, in which the trunk of the figure was of wood, and the head, hands and feet of marble. The wood was concealed either by gilding or, more commonly, by drapery, and the marble parts alone were exposed.