Perlibro, perlibras, pen pro. perlibrâre. Colu. To weigh dillgently: to make euen: to leuell: to trie by the plumbe rule. Iaculum tergo perlibrat ad osfa. Sil, He being behind him flingeth his dart and maketh it enter euen into the bone.
Lewis and Short: Latin dictionary
per-lībro, āvi, ātum, 1, v. a., to make exactly level, to level.I.Lit., Col. 3, 13, 13: permensum et perlibratum opus, id. 3, 13 fin.: planities non perlibrata, sed exigua prona,
not level
,
not horizontal
, id. 2, 2, 1: si quis Excelsa perlibrat, Sen. Q. N. 3, 27. —II.Transf., to hurl with a vibratory motion (poet.): saevamque bipennem Perlibrans mediae fronti, Sil. 2, 189: hastam, id. 5, 321: jaculum a tergo ad ossa, id. 15, 699.