ca·​lyp·​tra kə-ˈlip-trə How to pronounce calyptra (audio)
: a hoodlike structure in a plant
especially : haploid tissue forming a membranous hood over the capsule in a moss

Word History


New Latin, from Greek kalyptra veil, from kalyptein to cover — more at hell

First Known Use

circa 1753, in the meaning defined above

Time Traveler
The first known use of calyptra was circa 1753

Dictionary Entries Near calyptra

Cite this Entry

“Calyptra.” Dictionary, Merriam-Webster, Accessed 26 Feb. 2024.

More from Merriam-Webster on calyptra

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!