D defs.my
Entry 1 sense Webster, 1913

Calyptra

/(kȧ*lĭp"trȧ)/ · Ca·lyp·tra · IPA
01 n. A little hood or veil, resembling an extinguisher in form and position, covering each of the small flasklike capsules which contain the spo…
  1. 1.
    A little hood or veil, resembling an extinguisher in form and position, covering each of the small flasklike capsules which contain the spores of mosses; also, any similar covering body.(Bot.)