theca

[ thee-kuh ]

/ ˈθi kə /

noun, plural the·cae [thee-see]. /ˈθi si/.

a case or receptacle.

Botany, Mycology.

a sac, cell, or capsule.
a sporangium.

Anatomy, Zoology. a case or sheath enclosing an organ, structure, etc., as the horny covering of an insect pupa or the loose membrane covering the spinal cord.

Origin of theca

1655–65; <Latin thēca, from Greek thḗkē “case, cover,” akin to tithénai “to place, put”

OTHER WORDS FROM theca

thecal, adjective

Words nearby theca

Brothers Karamazov, The, The buck stops here, The Buddha, the business, The business of America is business, theca, theca-cell tumor, theca cordis, theca folliculi, thecal, Call of the Wild, The

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for theca

A chronic inflammatory involvement of a theca through which an important tendon plays may cause adhesions to form.
Lameness of the Horse|John Victor Lacroix
The theca became sessile, and in its later developments much flattened (fig. 11).
Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10|Various
The pear-shaped body is encased in a theca formed by a number of polygonal plates, and is attached by its narrow end.
Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10|Various
This theca grows in the direction of the apex of the sicula, to which it adheres by its dorsal wall.
Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3|Various

Horizontal plates or floors found in some Corals, extending across the cavity of the "theca" from side to side.
The Ancient Life History of the Earth|Henry Alleyne Nicholson

British Dictionary definitions for theca

theca

/ (ˈθiːkə) /

noun plural -cae (-siː)

botany an enclosing organ, cell, or spore case, esp the capsule of a moss

zoology a hard outer covering, such as the cup-shaped container of a coral polyp

Derived forms of theca

thecal or thecate, adjective

Word Origin for theca

C17: from Latin thēca, from Greek thēkē case; related to Greek tithenai to place

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for theca

theca

[ thē′kə ]

n. pl. the•cae (-sē′, -kē′)

A case, covering, or sheath, such as the outer covering of the cocoon of certain insects.

Scientific definitions for theca

theca

[ thē′kə ]

Plural thecae (thē′sē′, -kē′)

A case, covering, 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.

单词	theca
释义	theca [ thee-kuh ] / ˈθi kə / noun, plural the·cae [thee-see]. /ˈθi si/. a case or receptacle. Botany, Mycology. a sac, cell, or capsule. a sporangium. Anatomy, Zoology. a case or sheath enclosing an organ, structure, etc., as the horny covering of an insect pupa or the loose membrane covering the spinal cord. Origin of theca 1655–65; <Latin thēca, from Greek thḗkē “case, cover,” akin to tithénai “to place, put” OTHER WORDS FROM theca thecal, adjective Words nearby theca Brothers Karamazov, The, The buck stops here, The Buddha, the business, The business of America is business, theca, theca-cell tumor, theca cordis, theca folliculi, thecal, Call of the Wild, The Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for theca A chronic inflammatory involvement of a theca through which an important tendon plays may cause adhesions to form. Lameness of the Horse\|John Victor Lacroix The theca became sessile, and in its later developments much flattened (fig. 11). Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10\|Various The pear-shaped body is encased in a theca formed by a number of polygonal plates, and is attached by its narrow end. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10\|Various This theca grows in the direction of the apex of the sicula, to which it adheres by its dorsal wall. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3\|Various Horizontal plates or floors found in some Corals, extending across the cavity of the "theca" from side to side. The Ancient Life History of the Earth\|Henry Alleyne Nicholson British Dictionary definitions for theca theca / (ˈθiːkə) / noun plural -cae (-siː) botany an enclosing organ, cell, or spore case, esp the capsule of a moss zoology a hard outer covering, such as the cup-shaped container of a coral polyp Derived forms of theca thecal or thecate, adjective Word Origin for theca C17: from Latin thēca, from Greek thēkē case; related to Greek tithenai to place Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Medical definitions for theca theca [ thē′kə ] n. pl. the•cae (-sē′, -kē′) A case, covering, or sheath, such as the outer covering of the cocoon of certain insects. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for theca theca [ thē′kə ] Plural thecae (thē′sē′, -kē′) A case, covering, 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. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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