n.; pl. -ta [L. septum, partition]
1. Any dividing wall, membrane or partition separating cavities or masses of tissue; a dissepiment.
Two layers of peritoneal cells enclosing muscle fibers, and blood vessels that separate adjacent segments.
3. (ARTHROPODA: Crustacea)
For barnacles, see transverse septum.
Long, narrow, elevation of the secondary (shell) layer, usually bladelike. a. In Articulata, within underlying floor of valve with high, narrow deflections of fibrous calcite starting near the primary layer. b. In Inarticulata, comparable deflections of the shell lamellae.
5. (MOLLUSCA: Cephalopoda)
A calcareous tube that supports the siphuncle.
6. (MOLLUSCA: Gastropoda)
A transverse plate secreted with early formed whorls of shell.

Online Dictionary of Invertebrate Zoology. . 2005.

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  • septum — [ sɛptɔm ] n. m. • v. 1560; mot lat. « cloison » ♦ Anat., zool. Cloison séparant deux cavités (d un organe, d un organisme). Septum nasal. Septum interventriculaire, interauriculaire du cœur. Adj. SEPTAL, ALE, AUX . ● septum nom masculin (latin… …   Encyclopédie Universelle

  • Septum — Sep tum, n.; pl. {Septa}. [L. septum, saeptum, an inclosure, hedge, fence, fr. sepire, saepire, to hedge in, inclose.] 1. A wall separating two cavities; a partition; as, the nasal septum. [1913 Webster] 2. (Bot.) A partition that separates the… …   The Collaborative International Dictionary of English

  • septum — sèptum m DEFINICIJA anat. pregrada što u tijelu dijeli dvije šupljine, dijelove organa i sl. [nosni septum] ETIMOLOGIJA lat. septum, saeptum …   Hrvatski jezični portal

  • septum — septum. См. септа. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Septum [1] — Septum (lat.), Scheidewand in einem organischen T. heile, z.B. S. cordis, s. Herz S. 296. S. Iucĭdum (S. pellucidum), die markige Scheidewand des Gehirns, s.d.i. A) d). S. narĭum ossĕum, s.u. Nase 1) B) a) aa). S. scroti, so v.w. Scheidewand des… …   Pierer's Universal-Lexikon

  • Septum [2] — Septum (a. Geogr.), so v.w. Septa, s. Ceuta 2) …   Pierer's Universal-Lexikon

  • Septum — (lat), Scheidewand, z. B. S. narium, Nasenscheidewand …   Meyers Großes Konversations-Lexikon

  • Septum — Septum, lat., in der Anatomie Scheidewand zwischen 2 Höhlen …   Herders Conversations-Lexikon

  • septum — partition between the nostrils, 1690s, Mod.L., from L. saeptum a fence, from neut. pp. of saepire to hedge in, from saepes hedge, fence …   Etymology dictionary

  • septum — ► NOUN (pl. septa) chiefly Anatomy & Biology ▪ a partition separating two chambers, such as that between the nostrils or the chambers of the heart. ORIGIN Latin, from sepire enclose …   English terms dictionary

  • septum — [sep′təm] n. pl. septums or septa [sep′tə] [ModL < L, enclosure, hedge < saepire, to enclose, fence < saepes, a hedge < IE base * saip , hedge fence > Gr haimos, thicket] Biol. a thin wall, membrane, etc. that separates two… …   English World dictionary

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