<p><strong>Noun</strong></p><ul><li>Also turquoise.</li><li>an opaque mineral, a basic hydrous copper aluminum phosphate often containing a small amount of iron, sky-blue or greenish-blue in color, cut cabochon as a gem.</li><li>Compare bone turquoise.</li><li>Also called turquoise blue.</li><li>a greenish blue or bluish green.</li></ul>