Realgar

[ri'ælgә]

(noun.) a rare soft orange mineral consisting of arsenic sulphide; an important ore of arsenic.

Typist: Willard--From WordNet

(n.) Arsenic sulphide, a mineral of a brilliant red color; red orpiment. It is also an artificial product.

Checker: Rudolph

n. Red orpiment, red sulphuret of arsenic.

Checked by Elton

n. a native sulphuret of arsenic a mineral consisting of about 70 parts of arsenic and 30 of sulphur and of a brilliant red colour.

Inputed by Lewis