antĭsigmă, ătis, n., = ἀντίσιγμα.
I A character , Ↄ, which the emperor Claudius wished to introduce into Latin for ps = the Gr. ψ, Prisc. p. 558 P.; cf. Schneid. Gram. 1, 5; Wordsworth's Early Lat. p. 9.—
II A critical mark , Ↄ, placed before a verse which is to be transposed , Isid. Orig. 1, 20.