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calyptra

[kuh-lip-truh]

noun Botany.

Also called cap. a hood or hoodlike part, as the lid of the capsule in mosses.

a root cap.

Origin:
1745–55; < Neo-Latin < Greek kalýptra veil, covering, equivalent to kalýp(tein) to veil, cover + -tra noun suffix

Related forms

ca·lyp·trate

[kuh-lip-treyt] , adjective

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Link To calyptra

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Calyptra is always a great word to know.

So is gametophyte. Does it mean:

sexual form of a haploid plant in the alternation of generations

phylum of green, nonvascular, seedless plants comprised of true mosses, hornworts and liverworts

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Collins

World English Dictionary

calyptra (kəˈlɪptrə)

—n
1.	a membranous hood covering the spore-bearing capsule of mosses and liverworts
2.	any hoodlike structure, such as a root cap

[C18: from New Latin, from Greek kaluptra hood, from kaluptein to cover]

calyptrate

—*adj*

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage

Science Dictionary

calyptra

(kə-lĭp'trə) Pronunciation Key

In some bryophyte plants, a structure that covers the young sporophyte as it develops within the tissues of its gametophyte parent. The calyptra, which consists of a thickening of the archegonium walls, eventually breaks open as the spore capsule grows.
See root cap.

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Related Words

calyptrogen

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