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Theca
(redirected from thecal)

    Also found in: Dictionary/thesaurus, Medical, Wikipedia 0.01 sec.
theca [′thē·kə]
(anatomy)
The sheath of dura mater which covers the spinal cord.
(botany)
A moss capsule.
A pollen sac.
(histology)
The layer of stroma surrounding a Graafian follicle.
(invertebrate zoology)
The test of a testate protozoan or a rotifer.
Theca 

various types of sheath in animals and plants:

(1) A cell wall in certain amoebae (thecamoebae).

(2) A chitinoid membrane in hydroid polyps; hence the division into the suborders Thecaphora and Athecata.

(3) The connective tissue surrounding ovarian follicles in vertebrates (theca folliculi).

(4) A tooth socket in the jawbone of mammals and crocodiles.

(5) A capsule for spores in mosses.

(6) The valve of a silicified test; in diatoms, the upper half is the epitheca and the lower half, the hypotheca.

(7) The pollen sac of an anther in angiosperms.
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After fixation in NBF the whole mounts were examined both unstained and after PAS staining to color both the oocyte chorion and the basement membrane between the granulosa and thecal layers of the follicle.
Advances in methods for determining fecundity: application of the new ... by Witthames, Peter R.; Thorsen, Anders; Murua, Hilario; Saborido-Rey, Francisco; Greenwood, Lorraine N / Fishery Bulletin
Sagittal T2-weighted magnetic resonance images showed a dorsally compressed thecal sac at T10/11, conus medullaris at L1/2, and stenosis at T10 to L5 (Fig.
Ossification of the thoracic ligamentum flavum in an achondroplastic ... by K Suzuki and M Kanamori and M Nobukiyo / Journal of Orthopaedic Surgery
They may contain granulosa cells, thecal cells, Sertoli cells, or fibroblasts of gonadal stromal origin.
Juvenile granulosa cell tumor of the ovary by Long, Jeremiah R.; Danielson, David / Applied Radiology
 
 
 
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