theca


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Related to theca: theca folliculi

the·ca

 (thē′kə)
n. pl. the·cae (-sē′, -kē′)
A case, covering, or sheath, such as the covering of the pollen sacs of an anther or the thick cell wall of certain dinoflagellates.

[Latin thēca, case, receptacle, from Greek thēkē; see dhē- in Indo-European roots.]

the′cal (-kəl) adj.

theca

(ˈθiːkə)
n, pl -cae (-siː)
1. (Botany) botany an enclosing organ, cell, or spore case, esp the capsule of a moss
2. (Zoology) zoology a hard outer covering, such as the cup-shaped container of a coral polyp
[C17: from Latin thēca, from Greek thēkē case; related to Greek tithenai to place]
ˈthecal, ˈthecate adj

the•ca

(ˈθi kə)

n., pl. -cae (-sē).
1. a case or sheath enclosing an animal organ, structure, etc., as the horny covering of an insect pupa.
2. a sac, cell, capsule, or sporangium of a plant or mushroom.
[1655–65; < Latin thēca < Greek thḗkē case, cover, akin to tithénai to place, put]
the′cal, the′cate (-kɪt, -keɪt) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.theca - a case or sheath especially a pollen sac or moss capsule
covering, natural covering, cover - a natural object that covers or envelops; "under a covering of dust"; "the fox was flushed from its cover"
2.theca - outer sheath of the pupa of certain insects
sheath, case - an enveloping structure or covering enclosing an animal or plant organ or part
Translations

the·ca

n. teca, envoltura o capa que actúa esp. como protectora de un órgano.
References in periodicals archive ?
They have densely reticulated tubaria, nema incorporated into the lateral wall and the largest and the most variable singular genicular processes, which may extend proximally covering the apertures and part of the theca (Kozlowska-Dawidziuk 1990).
Elytral and posterior wing theca closely appressed, curved ventrally around body; elytral theca extending to middle of abdominal segment III; posterior wing theca extending to middle of abdominal segment IV.
Theca Gallery Lugano decided to expose the Afghanistan artist this winter, Mohsen Taasha Wahidi, as well as in Lugano in three other different curatorial areas.
brain, heart, liver, spleen, lung, theca folliculi) were collected and placed in 10% buffered formalin.
Insulin stimulates androgen accumulation in incubations of human ovarian stroma and theca.
Previous studies have shown that in adult rats, PRL binds on top the granulose cells and theca of large follicles and not to the interstitium (23).
The creation of an artificial ovary is the first time researchers have successfully created a three-dimensional environment that contains the three main types of ovarian cells: theca cells, granulose cells and eggs or oocytes.
The most abundant species was Centropyxis aculeata (Centropyxidae), whose flat-shaped theca presented an enormously varied morphology ranging from different numbers of aculei to different sizes.
The genomic and molecular studies demonstrated multiple alterations in the steroidogenic machinery of theca cells from PCOS women viz.
The end result of the chemotherapy can range from damage to steroid-producing cells and/or oocytes of developing ovarian follicles (granulosa and theca cells), which can cause temporary amenorrhea, to apoptotic death of primordial follicles, which results in premature ovarian failure (POF).
Insulin increases the action of luteinising hormone (LH) on theca cells, resulting in overproduction of androgens.