Dictionary

calyptra

noun ca·lyp·tra \kə-ˈlip-trə\

Definition of CALYPTRA

:  a hoodlike structure in a plant; especially :  haploid tissue forming a membranous hood over the capsule in a moss

Origin of CALYPTRA

New Latin, from Greek kalyptra veil, from kalyptein to cover — more at hell
First Known Use: circa 1753

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