Standard Lemma guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
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noun
Any of several external cases or sheaths.
The pollen-producing organ usually found in pairs and forming an anther.
Definition source: English Wiktionary via Wiktextract
Topics: biology, botany, natural-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Any of several external cases or sheaths.
The theca folliculi: the twin layers of cells surrounding the basal lamina of an ovarian follicle.
Definition source: English Wiktionary via Wiktextract
Topics: biology, medicine, natural-sciences, sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Any of several external cases or sheaths.
The thecal sac: the portion of the dura mater that surrounds the spinal cord and the cauda equina.
Definition source: English Wiktionary via Wiktextract
Topics: biology, medicine, natural-sciences, sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Any of several external cases or sheaths.
The membrane complex enveloping the cells of certain plankton including diatoms and dinoflagellates.
Definition source: English Wiktionary via Wiktextract
Topics: biology, botany, microbiology, natural-sciences, planktology
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Any of several external cases or sheaths.
The calcareous wall of a corallite, the exoskeleton of a coral polyp.
Definition source: English Wiktionary via Wiktextract
Qualifier: marine biology
Topics: biology, natural-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Any of several external cases or sheaths.
A sporangium: a spore case.
Definition source: English Wiktionary via Wiktextract
Topics: biology, microbiology, mycology, natural-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
A case for the corporal cloth used in the Eucharist.
Definition source: English Wiktionary via Wiktextract
Topics: Christianity
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
outer sheath of the pupa of certain insects
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
Broader terms: sheath, case
noun
a case or sheath especially a pollen sac or moss capsule
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: sac
Antonyms: none provided
Broader terms: covering, natural covering, cover
History
From New Latin, from Latin thēca, from Ancient Greek θήκη (thḗkē, “a case, box, receptacle”), from τίθημι (títhēmi, “put, set, place”). Doublet of tay.
