theca
(noun) outer sheath of the pupa of certain insects
theca, sac
(noun) a case or sheath especially a pollen sac or moss capsule
Source: WordNet® 3.1
theca (plural thecas or thecae)
(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.
(coral science) The calcareous wall of a corallite, the exoskeleton of a coral polyp.
(Christianity) A case for the corporal cloth used in the Eucharist.
• 'tache, Tache, Taché, Teach, Tâche, chate, cheat, he-cat, tache, teach
Source: Wiktionary
The"ca, n.; pl. Thecæ. Etym: [L., fr. Gr. Tick a cover.]
1. A sheath; a case; as, the theca, or cell, of an anther; the theca, or spore case, of a fungus; the theca of the spinal cord.
2. (Zoöl.) (a) The chitinous cup which protects the hydranths of certain hydroids. (b) The more or less cuplike calicle of a coral. (c) The wall forming a calicle of a coral.
Source: Webster’s Unabridged Dictionary 1913 Edition
27 May 2025
(noun) the property of being directional or maintaining a direction; “the directionality of written English is from left to right”
Coffee is a brewed drink prepared from roasted coffee beans, the seeds of berries from certain Coffea species. When coffee berries turn from green to bright red – indicating ripeness – they are picked, processed, and dried. Dried coffee seeds are roasted to varying degrees, depending on the desired flavor.
