theca

名词 n.
中文释义

英文释义

名词 n.
  1. Any of several external cases or sheaths.; The pollen-producing organ usually found in pairs and forming an anther.
  2. Any of several external cases or sheaths.; The theca folliculi: the twin layers of cells surrounding the basal lamina of an ovarian follicle.
  3. 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.
  4. Any of several external cases or sheaths.; The membrane complex enveloping the cells of certain plankton including diatoms and dinoflagellates.
  5. Any of several external cases or sheaths.; The calcareous wall of a corallite, the exoskeleton of a coral polyp.
  6. Any of several external cases or sheaths.; A sporangium: a spore case.
  7. A case for the corporal cloth used in the Eucharist.

词形变化

thecas plural thecae plural

词汇关系

衍生词
endotheca endothecium epitheca exotheca exothecium extrathecal gnathotheca gonotheca hydrotheca hypotheca intrathecal karyotheca mesotheca ootheca podotheca rhinotheca sarcotheca spermatheca spermatotheca theca cordis theca externa theca folliculi theca interna thecal thecaphore thecasporous thecate theciferous theciform thecitis thecoma
相关词
intrathecally thecium

词源

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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