ˌperəˈthēs(h)ēəm noun
( plural perithe·cia -)ēə)
Etymology: New Latin, from peri- + -thecium
: a spherical, cylindrical, or flask-shaped hollow fruiting body in various ascomycetous fungi that contains the asci, usually opens by a terminal pore, and sometimes includes the cleistothecium — compare apothecium