PERITHECIUM

[peri.the.ci.um] n, pl -cia [NL, fr. peri- + Gk thekion, dim. of theke case--more at tick] (ca. 1832): a spherical, cylindrical, or flask-shaped hollow fruiting body in various ascomycetous fungi that contains the asci and usu. opens by a terminal pore -- peri.the.cial adj