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1. The protective cap or hood covering the spore case of a moss or related plant.
2. A similar hoodlike or caplike structure, such as a root cap.

[Medieval Latin, from Greek kaluptra, veil, from kaluptein, to cover; see kel- in Indo-European roots.]

ca·lyp′trate′ (-trāt′) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.calyptrate - having calypters
2.calyptrate - having a calyptra
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References in periodicals archive ?
New records of calyptrate dipterans (Fanniidae, Muscidae and Sarcophagidae) associated with the decomposition of domestic pigs in Brazil.
It has variously been placed in the Calyptratae (Pont 1980: 713); or as a possible transitional family between acalyptrate and calyptrate flies, and probably closest to the Scathophagidae (as Cordyluridae) (van Emden 1950); or as related to families of acalyptrate flies, including Sphaeroceridae (as Borboridae) (Austen 1936) and Heleomyzidae (Sphaeroceroidea) (McAlpine 1989: 1484).
While calyptrate dipteran flies were consistently diverse and abundant throughout the study, hymenopteran (bee) taxa varied in abundance from pre- through post-bloom.