Definition of Orcein

1. n. A reddish brown amorphous dyestuff, &?;, obtained from orcin, and forming the essential coloring matter of cudbear and archil. It is closely related to litmus.



Definition of Orcein

1. Noun. (chemistry) a dye, related to litmus, that is extracted from the lichen ''Rocella tinctoria''; used as a microscopic stain and as a food colouring ¹

¹ Source: wiktionary.com

Definition of Orcein

1. a reddish brown dye [n -S]

Medical Definition of Orcein

1. A reddish brown amorphous dyestuff, obtained from orcin, and forming the essential colouring matter of cudbear and archil. It is closely related to litmus. Source: Websters Dictionary (01 Mar 1998)

Orcein Pictures

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Lexicographical Neighbors of Orcein

orbitosphenoidal
orbitotomy
orbits
orbituary
orbity
orbivirus
orbless
orblike
orbofiban
orbs
orbulina
orby
orc
orca
orcas
orcein (current term)
orceins
orcelite
orchal
orchals
orchanet
orchard
orchard apple tree
orchard heater
orchard heaters
orchard oriole
orcharder
orchardful
orcharding

Literary usage of Orcein

Below you will find example usage of this term as found in modern and/or classical literature:

1. Hand-book of Chemistry by Leopold Gmelin, Henry Watts (1858)
"100 pts. of dry orcein absorb, with evolution of heat, 8'06 pts. of ammoniacal gas (= 1 At. according to Kane); the compound has a deep violet colour and ..."

2. Elements of Chemistry by Thomas Graham (1842)
"orcein.—The orcein of archil is of a fine red colour, slightly soluble in water, ... orcein dissolves easily in potash or ammonia, giving it a magnificent ..."

3. Gynecological Pathology; a Manual of Microscopic Technique and Diagnosis in by Karl Abel, Samuel Wyllis Bandler (1901)
"... orcein 0.5, alcohol 40.0, aq. dest. 20.0, acid, hydrochlor. gtt. xx.), and are then placed for a few seconds in hydrochloric acid alcohol (acid muriatic ..."

4. Saint Louis Medical and Surgical Journal (1895)
"In marked contrast to the connective tissue are the muscles of the skin, colored blueish with a slight mixture of the orcein color. The orcein is also a ..."

5. Elements of Chemistry: Theoretical and Practical by William Allen Miller (1867)
"... and exposed to the air, the acid combines with the elements of ammonia, and a purple colour is gradually developed, owing to the production of orcein. ..."

6. Appleton's New Practical Cyclopedia: A New Work of Reference Based Upon the by George J Hagar (1910)
"... from century to century, and these changes, called secular variation, can be computed for hundreds of thousands of years past and to come. orcein ..."

7. Pathological technique by Frank Burr Mallory (1904)
"orcein, a vegetable dye obtained from certain tinctorial lichens, is used mainly for staining elastic fibers. It is soluble in alcohol, and is employed ..."

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