·noun A kind of coloring matter obtained from lichens.
PERSIS(ἡ Περσίς, Aeschyl. Pers. 60; Hdt. 3.19; Plin. Nat. 6.23. s. 25; Ammian. 23.6, &c. ἡ Περσική, ...
Dictionary of Greek and Roman Geography
Persis, ĭdis, v. Persae, II. A. ...
A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.