| 单词 | theca |
| 释义 | theca (once / 73871 pages) n WORD FAMILY theca: thecae USAGE EXAMPLESGraptolites, whose name means written in rock, were tiny animals that lived in colonies of little cuplike structures known as theca. Scientific American(Feb 10, 2015) From this bud is developed the first zooid and first serial theca of the colony. Various, Encyclopaedia Britannica, 11th Edit...(2011) The pear-shaped body is encased in a theca formed by a number of polygonal plates, and is attached by its narrow end. Various, Encyclopaedia Britannica, 11th Edit...(2011) 1n a case or sheath especially a pollen sac or moss capsule Syn|Hyper sac cover, covering, natural covering a natural object that covers or envelops 2n outer sheath of the pupa of certain insects Hyper case, sheath an enveloping structure or covering enclosing an animal or plant organ or part |
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