thēca, ae, f., = θήκη,
that in which any thing is enclosed , an envelope , hull , cover , case , sheath , etc. (syn. vagina): grani, Varr. R. R. 1, 48, 1: efferri sine thecis vasa, Cic. Verr. 2, 4, 23, § 52; id. Att. 4, 7, 2; Quint. 6, 3, 61: calamaria, Suet. Claud. 35; Mart. 14, 19, 1; Amm. 28, 4, 13.