A highly toxic lectin and hemagglutin occurring in the seeds (castor beans) of the castor oil plant, Ricinus communis; if eaten, acts as a violent irritant and may be fatal; an N-glycosidase that acts on the GOS subunit of rRNA.

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ri·cin 'rīs-ən, 'ris- n a poisonous protein in the castor bean

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a highly toxic albumin obtained from castor-oil seeds (Ricinus communis) that inhibits protein synthesis and becomes attached to the surface of cells, resulting in gastroenteritis, hepatic congestion and jaundice, and cardiovascular collapse. It is lethal to most species, even in minute amounts (1 µg/kg body weight); it is most toxic if injected intravenously or inhaled as fine particles. Ricin is being investigated as a treatment for certain lymphomas, which depends on its delivery to the exact site of the tumour in order to avoid destruction of healthy cells (see immunotoxin).

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ri·cin (riґsin) a phytotoxin found in the seeds of the castor oil plant (Ricinus communis), used in synthesis of immunotoxins; ingestion causes ricin poisoning.

Medical dictionary. 2011.

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  • ricin — ricin …   Dictionnaire des rimes

  • Ricin — (pronEng|ˈraɪ sɨn) is a protein toxin that is extracted from the castor bean ( Ricinus communis ).The U.S. Centers for Disease Control (CDC) gives a possible minimum figure of 500 micrograms (about the size of a grain of salt) Fact|date=May 2008… …   Wikipedia

  • ricin — [ risɛ̃ ] n. m. • 1548; lat. ricinus 1 ♦ Plante (euphorbiacées), à grandes feuilles palmées, dont le fruit est une capsule renfermant des graines oléagineuses. (1775) Huile de ricin, employée en médecine comme purgatif. Qui contient de l huile de …   Encyclopédie Universelle

  • ricin — RICÍN, ricini, s.m. Plantă erbacee sau arborescentă originară din Africa, cu rădăcina pivotantă, puternică, cu tulpina înaltă de 1 2 m, cu flori verzi, roşii sau violete; căpuşă (Ricinus communis). ♢ Ulei (sau unt) de ricin = ulei extras din… …   Dicționar Român

  • ricin — ricin; ricin·elaidic; ricin·ole·ate; ricin·oleic; ricin·ole·in; …   English syllables

  • Ricin — er en gift, der udvindes af castorbønneplanten, og som for mennesker er stærk dødelig. Dødeligheden afhænger af dosis, men selv få milligram er tilstrækkeligt til at slå ihjel. Ricin er cirka 6.000 gange mere giftigt end cyanid …   Danske encyklopædi

  • Ricīn — Ricīn, ein Eiweißkörper in Rizinussamen, bildet ein farbloses amorphes Pulver, löst sich in 10proz. Kochsalzlösung, reagiert neutral und ist ungemein giftig. In die Venen eingespritzt, tötet es einen Menschen in einer Dosis von 1,8 mg, vom Magen… …   Meyers Großes Konversations-Lexikon

  • ricin — poison obtained from the castor oil bean, 1896, from ricinus, genus name of the castor oil plant (1694), from L. ricinus (Pliny), perhaps the same word as ricinus tick (in sheep, dogs, etc.) …   Etymology dictionary

  • ricin — [rī′sin, ris′in] n. [< L ricinus, castor oil plant] an extremely toxic protein found in the castor bean and isolated as a white powder: it agglutinates red blood corpuscles …   English World dictionary

  • Ricin — Rizinussamen Rizin oder Ricin, ein äußerst toxisches Lektin aus den Samen von Ricinus communis – Familie der Wolfsmilchgewächse –, ist ein starker Inhibitor der eukaryotischen Proteinbiosynthese. Rizin ist einer der giftigsten Eiweißstoffe, die… …   Deutsch Wikipedia

  • Ricin — Ri|cin 〈n. 11〉 stark giftiges Protein aus der Ricinusstaude * * * Ri|cin [nlat. Ricinus communis = Rizinusstaude, Wunderbaum, Kastorbaum (Bot.)], das; s: sehr giftiges, agglutinierend u. cytotoxisch wirkendes Lectin (Protein). * * * Ricin   das,… …   Universal-Lexikon

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