Dictionary » T » Theca



Origin: L, fr. Gr. A case to put anything in. See Tick a cover.

1. A sheath; a case; as, the theca, or cell, of an anther; the theca, or spore case, of a fungus; the theca of the spinal cord.

2. (Science: zoology) The chitinous cup which protects the hydranths of certain hydroids. The more or less cuplike calicle of a coral.

The wall forming a calicle of a coral. A case or sheath especially a pollen sac or moss capsule.

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Question from a freshman-definitions

... I don't know what it mean by the thallus has dichotomous branching. What does it mean? What is cupules? In Funaria, what is seta? What is theca, operculum and apophysis?

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by Mafer
Sat Oct 07, 2006 2:05 pm
Forum: Botany Discussion
Topic: Question from a freshman-definitions
Replies: 12
Views: 8349

For Mr. Hill

... but no capsular material was identified surrounding the organisms. What is your diagnosis? Pathologic Diagnosis: Subcutaneous Protothecosis Prototheca species are aerobic, achlorophyllous, algaelike, unicellular organisms. The primary cell or spherule is known as the theca, and the appearance ...

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by C3
Tue Jan 31, 2006 6:59 pm
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 6245956

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