[ rɪ'algə ]
■ noun a soft reddish mineral consisting of arsenic sulphide, formerly used as a pigment and in fireworks.
Origin
ME: via med. L. from Arab. rahj al-ġār 'arsenic', lit. 'dust of the cave'.
[ rɪ'algə ]
■ noun a soft reddish mineral consisting of arsenic sulphide, formerly used as a pigment and in fireworks.
Origin
ME: via med. L. from Arab. rahj al-ġār 'arsenic', lit. 'dust of the cave'.
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004