Ceratia, ceratiæ, Plin. An hearlie haning but one leafe, and a great roote full of knots.Ceratia stella.A blasing starre like an horne.
Ceratium, Sili qua est Græca. Colum. By the weight there of Phisitions made all the poyses: tryers of golde doe now cal it a carract, whereof a dramme conteineth will. as Partius writeth.
Lewis and Short: Latin dictionary
cĕrătĭa, ae, f., = kerati/a, a plant with a single leaf, Plin. 26, 8, 34, 52.
cĕrătĭum, ii, n., = kera/tion (St. John's bread), a Greek weight corresponding to the Latin siliqua = 2. calculi, Auct. Ponder. in Goes. Agrar. p. 322 (in Col. 5, 10, 20, and Arb. 25, 1, written as Greek).