dictionary help| sienna | medical dictionary |
<chemistry> Clay that is coloured red or brown by the oxides of iron or manganese, and used as a pigment. It is used either in the raw state or burnt. Burnt sienna, sienna made of a much redder colour by the action of fire. Raw sienna, sienna in its natural state, of a transparent yellowish brown colour.
Origin: It. Terra di Siena, fr. Siena in Italy.
(01 Mar 1998)
siemens-martin process, Siemens Nixdorf Informationssteme, AG, sienite < Prev | Next > Sierra, sierra leone, sieva, sieve
Bookmark with:      | word visualiser | Go and visit our forums  |
