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Theca
//ˈθiːkə// noun
Definitions
Noun
- 1 Any of several external cases or sheaths.; The pollen-producing organ usually found in pairs and forming an anther.
- 2 outer sheath of the pupa of certain insects wordnet
- 3 Any of several external cases or sheaths.; The theca folliculi: the twin layers of cells surrounding the basal lamina of an ovarian follicle.
- 4 a case or sheath especially a pollen sac or moss capsule wordnet
- 5 Any of several external cases or sheaths.; The thecal sac: the portion of the dura mater that surrounds the spinal cord and the cauda equina.
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- 6 Any of several external cases or sheaths.; The membrane complex enveloping the cells of certain plankton including diatoms and dinoflagellates.
- 7 Any of several external cases or sheaths.; The calcareous wall of a corallite, the exoskeleton of a coral polyp.
- 8 Any of several external cases or sheaths.; A sporangium: a spore case.
- 9 A case for the corporal cloth used in the Eucharist.
Etymology
From New Latin, from Latin thēca, from Ancient Greek θήκη (thḗkē, “a case, box, receptacle”), from τίθημι (títhēmi, “put, set, place”). Doublet of tay.
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