calyptra (English, noun)
expansion: calyptra (plural calyptras or calyptrae)
Senses:
topics: biology
botany
natural-sciences
glosses: In bryophytes, a thin hood of tissue that forms from the archegonium and covers the developing sporophyte and is shed as it ripens.
topics: biology
botany
natural-sciences
glosses: any cap-like covering of a flower or fruit, such as the operculum over the unopened buds of Eucalyptus flowers
topics: biology
botany
natural-sciences
glosses: Any of various coverings at the tips of structures, in the terminology of various authors; for example rootcaps and the apical cells of trichomes.
topics: biology
entomology
natural-sciences
glosses: In flies such as the housefly, Musca, in the taxonomic order Diptera, zoological section Schizophora, subsection Calyptrata, the calyptra is a membranous rearward extension of the forewing; it covers the haltere.
Forms:
form: calyptras
tags: plural
form: calyptrae
tags: plural