Orcein Or"ce*in, n. (Chem.) A reddish brown amorphous dyestuff, {C7H7NO3}, obtained from orcin, and forming the essential coloring matter of cudbear and archil. It is closely related to litmus. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • Orcein — ist ein organischer Pflanzenfarbstoff aus Flechten und ein Gemisch aus mindestens 14 Stoffen. Inhaltsverzeichnis 1 Vorkommen und Gewinnung 2 Zusammensetzung und Eigenschaften 3 Verwendung …   Deutsch Wikipedia

  • Orcein — Orcein, also archil, orchil, lacmus, Citrus Red 2, and C.I. Natural Red 28, are names for dyes extracted from several species of lichen, commonly known as orchella weeds , found in various parts of the world. A major source is the archil lichen,… …   Wikipedia

  • Orceïn — (Orceïnsäure), C14H7NO6, entsteht aus α Orcin bei der Einwirkung von Ammoniak, Wasser u. Luft, als ein schön rother Körper, welcher bei längerer Einwirkung von Ammoniak in eine braune Materie übergeht; es löst sich in Ammoniak mit tiefrother… …   Pierer's Universal-Lexikon

  • orcein — orcein. См. орсеин. (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.

  • Orceïn — Orceïn, s. Orcin …   Meyers Großes Konversations-Lexikon

  • orcein — [ôr′sē in] n. [ ORC(IN) + e + IN1] a brownish red, crystalline dye, C28H24N2O7, the main coloring matter of orchil, obtained from lichens or by treating orcinol with ammonia, and used as a biological stain, reagent, etc …   English World dictionary

  • Orcein — Or|ce|in [anagrammatisch aus Rocela, eine Flechtenart (Bot.) oder Rocela (Florentiner Kaufmann des 14. Jh.); ↑ in (3)], das; s: aus Orseille, einem früher zur Textilfärbung benutzten Flechtenfarbstoff isolierbares Gemisch von… …   Universal-Lexikon

  • orcein — /awr see in/, n. Chem. a red dye, the principal coloring matter of cudbear and orchil, obtained by oxidizing an ammoniacal solution of orcinol. [1830 40; arbitrary alter. of orcin; see ORCINOL] * * * …   Universalium

  • orcein — noun a dye, related to litmus, that is extracted from the lichen Rocella tinctoria; used as a microscopic stain and as a food colouring Syn: E121, orchil …   Wiktionary

  • orcein — A natural dye derived from orcinol by treatment with air and ammonia, which as a purple dye complex is used in various histologic staining methods. * * * or·ce·in ȯr sē ən n a purple nitrogenous dye that is the essential coloring matter of… …   Medical dictionary

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