Open Dictionary
mouse here to listen, click to choose/add more
Location: USA
Source: Learn That Word
Profile URL:

Are you a native English speaker? How do you pronounce this word?

Thank you for contributing!
upload mp3 file or record now it's easy, promised!

{%type%} Definitions

WordNet 3.0Copyright Princeton University


Short "hint"

n. - Outer sheath of the pupa of certain insects; A case or sheath especially a pollen sac or moss capsule.

Usage examples (21)
  • Fully formed ovarian follicle: • Outside the theca interna some fibrous tissue becomes condensed to form another covering for the follicle called the theca externa.
  • A chronic inflammatory involvement of a theca through which an important tendon plays may cause adhesions to form.
  • In addition to aspirating synovia, the introduction of equal parts of alcohol and tincture of iodin into the theca is necessary.
  • Bibliographies of alchemical texts date from an early period, but the two standard lists are J. Ferguson, Biblio - theca Chemica, 2 vols. for more
Tutoring comment

Tutoring comment not yet available...

add more
The Open Dictionary of English is a collaborative project, based on Open Source materials, LearnThat resources, and partner APIs.
We give special thanks to our LearnThat volunteers, as well as Princeton University and Wiktionary for their Open Source word data. We're also grateful for the support given by Google,,, and YouTube,,,,, as well as the generous Creative Commons community.