ἑφθημῐμερής,ές,
A. containing seven halves, i.e. 3
1 / 2 : esp. in metre, -μερές,τό ,a measure of three feet and a half, such as the first 3
1 / 2 feet of a Hexameter or Iambic Trimeter, Heph. 7.3 , Sch. Ar. Pl. 302 (pl.), etc.;ἑ. τομήa caesura after such a phrase, Aristid.
Quint. 1.25 .