'Peritreme' definitions:

Definition of 'Peritreme'

From: GCIDE

Peritreme \Per"i*treme\, n. [Pref. peri- + Gr. ? a hole.] (Zool.) (a) That part of the integument of an insect which surrounds the spiracles. (b) The edge of the aperture of a univalve shell. [1913 Webster]