ap·o·the·ci·um 
(ăp′ə-thēsē-əm, -shē-)
(ăp′ə-thēsē-əm, -shē-)n. pl. ap·o·the·ci·a (-sē-ə, -shē-ə)
A disk-shaped or cup-shaped ascocarp of some lichens and ascomycetous fungi.
[From Latin apothēca, storehouse; see APOTHECARY.]
ap′o·thecial (-shəl) adj.