Definition of: apothecium

(ap′ə·thē′shē·əm, -sē·əm) noun plural ·ci·a (-shē·ə, -sē·ə) Bot.
An open, more or less cup-shaped fruit body in which the ascibearing layer lies exposed during the maturing of the asci; an ascocarp. Also ap·o·the·ce (ap′ə·thē′sē, ap′ə·thēs). [<NL < Gk. apothēkē storehouse]
—ap′o·the′cial (-shəl) adjective