Thē'ca, n.

n.; pl. THĒ'CÆ. [Lat., from Gr. θήκη, a case to put any thing in, a box, chest, from τιθέναι, to put, set.] A sheath, case, or envelope; especially, (a.) (Bot.) The cell of an anther; also, a spore-case. Gray. (b.) (Anat.) An organ or part which incloses another, or which contains something; case; sheath.