theca fol·lic·u·li -fə-'lik-yə-.lī n the outer covering of a graafian follicle that is made up of the theca externa and theca interna
* * *
an envelope of condensed connective tissue surrounding a vesicular ovarian follicle, comprising an internal vascular layer (t. interna) and an external fibrous layer (t. externa).Medical dictionary. 2011.