perigonium

[per-i-goh-nee-uh m]
noun, plural per·i·go·ni·a [per-i-goh-nee-uh] /ˌpɛr ɪˈgoʊ ni ə/. Botany.
  1. the envelope of modified leaves surrounding the antheridia in mosses.
Also per·i·gone [per-i-gohn] /ˈpɛr ɪˌgoʊn/.

Origin of perigonium

From New Latin, dating back to 1810–20; see origin at peri-, -gonium
Related formsper·i·go·ni·al, per·i·go·nal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for perigonium

Historical Examples of perigonium