| ARECA | • areca n. Any member of the genus Areca of about fifty species of single-stemmed palms in the family Arecaceae… • Areca prop.n. A taxonomic genus within the family Arecaceae – palms native to tropical Asia.
 • ARECA n. (Malay) a tree of the betelnut genus of palms, native to SE Asia and the Indian subcontinent.
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| BIBLIOTHECA | • bibliotheca n. (Obsolete) A library. • BIBLIOTHECA n. a collection of books; a list of books.
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| CAECA | • caeca n. Plural of caecum. • cæca n. Plural of cæcum.
 • CAECUM n. (Latin) a bodily cavity with one opening, also CECUM.
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| CECA | • ceca n. Plural of cecum. • CECUM n. (Latin) a bodily cavity with one opening, also CAECUM.
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| EPITHECA | • epitheca n. (Microbiology, planktology) The upper half of the theca of a thecate protist such as a diatom or dinoflagellate. • EPITHECA n. the outer older cell layer of a diatom.
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| GLYPTOTHECA | • glyptotheca n. A room or building devoted to works of sculpture. • GLYPTOTHECA n. a place for keeping sculpture.
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| HYDROTHECA | • hydrotheca n. (Zoology) One of the calicles that protect the hydranths in certain Hydroidea (Thecaphora). • HYDROTHECA n. the horny cup of a hydranth.
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| HYPOTHECA | • hypotheca n. (Microbiology, planktology) The lower or posterior half of the theca of a thecate protist such as a… • HYPOTHECA n. the inner and younger layer of the cell wall of a diatom.
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| OOTHECA | • ootheca n. An egg case of any of the orthopteroid insects (such as cockroaches and mantids). • oötheca n. Alternative spelling of ootheca.
 • OOTHECA n. (Greek) the egg case of certain insects.
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| PINACOTHECA | • pinacotheca n. An art gallery (especially a picture gallery). • PINACOTHECA n. a picture-gallery.
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| RHAMPHOTHECA | • rhamphotheca n. A thin horny sheath of keratin on the outer surface of a bird’s beak. • RHAMPHOTHECA n. the horny or leathery outer layer of a bird's bill.
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| RHINOTHECA | • rhinotheca n. The hornlike covering of the upper part of a bird’s beak. • RHINOTHECA n. the sheath of the upper mandible of a bird.
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| SENECA | • Seneca prop.n. A Roman cognomen, notably borne by Lucius Annaeus Seneca, a Roman stoic philosopher, dramatist, and statesman. • Seneca n. A member of a tribe of Native Americans in western New York state.
 • Seneca prop.n. The Iroquoian language of the Seneca people.
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| SPERMATHECA | • spermatheca n. (Anatomy) A small sac within the reproductive tract of some female invertebrates, such as insects, which… • SPERMATHECA n. a receptacle for storing spermatozoa in insects.
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| SPERMATOTHECA | • spermatotheca n. Synonym of spermatheca. • SPERMATOTHECA n. a receptacle for storing sperm.
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| THECA | • theca n. (Biology) Any external case or sheath. • theca n. (Botany) The pollen-producing organ usually found in pairs and forming an anther.
 • theca n. (Medicine) The twin layers of cells surrounding the basal lamina of an ovarian follicle.
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