theca

n. 囊, 膜, 鞘 [医] 膜, 鞘

发音

其它 /ˈθiːkə/

词形变化

thecae thecas 复数 thecas thecae 复数

释义与例句

n.
  1. 1.

    Any of several external cases or sheaths.

    The pollen-producing organ usually found in pairs and forming an anther.

    生物 植物学
  2. 2.

    Any of several external cases or sheaths.

    The theca folliculi: the twin layers of cells surrounding the basal lamina of an ovarian follicle.

    生物 医学
  3. 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.

    生物 医学
  4. 4.

    Any of several external cases or sheaths.

    The membrane complex enveloping the cells of certain plankton including diatoms and dinoflagellates.

    生物 植物学
  5. 5.

    Any of several external cases or sheaths.

    The calcareous wall of a corallite, the exoskeleton of a coral polyp.

    生物
  6. 6.

    Any of several external cases or sheaths.

    A sporangium: a spore case.

    生物 植物学
  7. 7.

    A case for the corporal cloth used in the Eucharist.

    宗教

词汇关系

名词

同义词 1

sac

上位词 4

case cover covering sheath

相关短语

theca cordis [医] 心包

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.

来源：wiktionary