
1) Animal anatomy 2) Cover 3) Covering 4) Natural covering 5) Pupa cover
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https://www.crosswordclues.com/clue/theca

1) Sac
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https://www.crosswordclues.com/clue/theca

Latin, meaning: case, envelope, covering.
Found on
http://archives.nd.edu/ttt.htm

A theca (plural thecae) refers to any case, covering, or sheath. In botany, the theca of an angiosperm consists of a pair of microsporangia that are adjacent to each other and share a common area of dehiscence called the stomium. Any part of a microsporophyll that bears microsporangia is called an anther. Most anthers are formed on the apex of a f...
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http://en.wikipedia.org/wiki/Theca

sheath; capsule
Found on
http://phrontistery.info/t.html

• (n.) 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. • (n.) The more or less cuplike calicle of a coral. • (n.) The wall forming a calicle of a coral. • (n.) The chitinous cup which protects the hydranths of certain hydroids.Theca: words in the defini...
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http://thinkexist.com/dictionary/meaning/theca/

(from the article `Ceratium`) ...are armoured dinoflagellates. (A dinoflagellate has two unlike flagella and has both plant and animal characteristics.) The cell contains ... The ovarian follicle of vertebrates, commencing with hagfish, is surrounded by a theca, or sheath, composed of two concentric layers of stromal ... [2 related a...
Found on
http://www.britannica.com/eb/a-z/t/34

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. <zoology> The chitinous cup which protects the hydranths of certain hydroids. The more or less cuplike calicle of a coral. ... The wall formi...
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http://www.encyclo.co.uk/local/20973

(the´kә) Latin word meaning a case or sheath; a term used in anatomy. adj., the´cal., adj. theca cordis pericardium. theca folliculi an envelope of condensed connective tissue surrounding a vesicular ovarian follicle; it is composed of an int...
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http://www.encyclo.co.uk/local/21001

The'ca noun ; plural Thecæ . [ Latin , from Greek ... 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.
Found on
http://www.encyclo.co.uk/webster/T/38

Type: Term Pronunciation: thē′kă, thē′sē Definitions: 1. A sheath or capsule.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=91160

In anatomy, a theca is a case or sheath which encloses some organ or part.
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http://www.probertencyclopaedia.com/browse/ET.HTM

General term for any stiff outer covering of a unicellular protist, and usually made up of interlocking plates. dinoflagellates and diatoms are examples of protists with thecae.
Found on
http://www.ucmp.berkeley.edu/glossary/glossary_4.html

[
n] - a case or sheath especially a pollen sac or moss capsule 2. [n] - outer sheath of the pupa of certain insects
Found on
http://www.webdictionary.co.uk/definition.php?query=theca

theca (s), thecae (pl) 1. A case, covering, receptacle, or sheath; such as, the pollen sac of an anther, the spore case of a moss, or the outer covering of the pupa of certain insects. 2. The outer covering of the cocoon of certain insects.
Found on
http://www.wordinfo.info/words/index/info/view_unit/2133/3
sac noun a case or sheath especially a pollen sac or moss capsule
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https://www.encyclo.co.uk/local/20974

Greek theka = a capsule, sheath.
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https://www.encyclo.co.uk/local/21450

A layer which encloses a body, may refer to a closely adpressed rigid wall, or to a more loosely-attached rigid lorica or test or even to a soft enclosing sheath of material.
Found on
https://www.encyclo.co.uk/local/22457

the lateral half of an anther
Found on
https://www.encyclo.co.uk/local/22591

case, envelope, covering.
Found on
https://www.math.ubc.ca/~cass/frivs/latin/latin-dict-full.html
No exact match found.