calyptra

English[edit]

From Ancient Greek καλύπτρα (kalúptra, “covering or veiling”).

calyptra (plural calyptras or calyptrae)

(botany) In bryophytes, a thin, hood of tissue that forms from the archegonium and covers the developing sporophyte and is shed as it ripens.^[1]
- 1992, Rudolf M[athias] Schuster, The Hepaticae and Anthocerotae of North America: East of the Hundredth Meridian, volume V, New York, N.Y.: Columbia University Press, →ISBN, page 4:
  (b) sporophyte with foot reduced, the entire sporophyte enveloped by the calyptra, which is ± stipitate at the base.
(botany) any cap-like covering of a flower or fruit, such as the operculum over the unopened buds of Eucalyptus flowers^[1]
(botany) Any of various coverings at the tips of structures, in the terminology of various authors; for example rootcaps and the apical cells of trichomes.^[1]
(entomology) 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.^[2]

thin, hood-like tissue

↑ ^1.0 ^1.1 ^1.2 Jackson, Benjamin, Daydon; A Glossary of Botanic Terms with their Derivation and Accent; Published by Gerald Duckworth & Co. London, 4th ed 1928
^ C. R, Osten Sacken. Notice on the terms: Tegula, antitegula, squama and alula, as used in Dipterology [1]

calyptra f (genitive calyptrae); first declension

“calyptra”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
calyptra in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette