\Ca*lyp"tra\ (k[.a]*l[i^]p"tr[.a]), n. [NL., fr. Gr.
kaly`ptra a covering for the head, fr. kaly`ptein to cover.]
(Bot.)
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.