'Perithecium' definitions:

Definition of 'perithecium'

(from WordNet)
noun
Flask-shaped ascocarp

Definition of 'Perithecium'

From: GCIDE
  • Perithecium \Per`i*the"ci*um\, n. [NL., fr. Gr. peri` around + ? box.] (Bot.) An organ in certain fungi and lichens, surrounding and enveloping the masses of fructification. --Henslow. [1913 Webster]