theca
IPA: θˈɛkʌ
noun
- (biology) Any external case or sheath.
- (botany) The pollen-producing organ usually found in pairs and forming an anther.
- (medicine) The twin layers of cells surrounding the basal lamina of an ovarian follicle.
- (microbiology, planktology) The membrane complex enveloping the cells of certain plankton including diatoms and dinoflagellates.
- (marine biology) The calcareous wall of a corallite, the exoskeleton of a coral polyp.
- (Christianity) A case for the corporal cloth used in the Eucharist.
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Examples of "theca" in Sentences
- The outer cells of the theca form the epidermis.
- The mouth was located at the summit of the theca.
- A Theca lutein cyst is a type of functional ovarian cyst.
- A 'Theca lutein cyst' is a type of functional ovarian cyst.
- The theca externa is the outer layers of the theca folliculi.
- The theca folliculi comprise a layer of the ovarian follicles.
- Hyperthecosis is hyperplasia of the theca interna of the ovary.
- Each theca has one sporangium, whereas for most angiosperms, there are two.
- The theca are divided into two layers, the theca interna and the theca externa.
- Outside the basal lamina, the layers theca interna and theca externa are found.
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