theca

thēca ae, f

, θήκη, an envelope, hull, cover, case, sheath: efferri sine thecis vasa: nummaria.

theca
thēca, ae, f., = θήκη, that in which any thing is enclosed , an envelope , hull , cover , case ,...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
Theca
·noun The wall forming a calicle of a coral. II. Theca ·noun The more or less cuplike calicle of a ...

Webster's Dictionary of the English Language