turquoise

UK:^*^*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈtɜː^rkwɔɪz/, /ˈtɜː^rkwɑːz/

US:USA pronunciation: IPAUSA pronunciation: IPA/ˈtɝkɔɪz, -kwɔɪz/

US:USA pronunciation: respellingUSA pronunciation: respelling(tûr′koiz, -kwoiz)

tur•quoise /ˈtɜrkɔɪz, -kwɔɪz/USA pronunciation n.

Jewelry, Mineralogya mineral of copper and aluminum, colored greenish blue and cut as a gem: [countable]an exquisite turquoise.[uncountable]a ring of turquoise.
[uncountable] Also called ˈtur•quoise ˈblue. a greenish blue or bluish green.

tur•quoise (tûr′koiz, -kwoiz),USA pronunciation n.

Jewelry, MineralogyAlso, tur′quois. 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. Cf. bone turquoise.
Also called tur′quoise blue′. a greenish blue or bluish green.

Middle French
French: Turkish (stone), equivalent. to Turc Turkish + -oise, feminine of -ois -ese; replacing Middle English turkeis
1350–1400

Collins Concise English Dictionary © HarperCollins Publishers::

turquoise /ˈtɜːkwɔɪz; -kwɑːz/ n

a greenish-blue fine-grained secondary mineral consisting of hydrated copper aluminium phosphate. It occurs in igneous rocks rich in aluminium and is used as a gemstone. Formula: CuAl₆(PO₄)₄(OH)₈.4H₂O
- the colour of turquoise
- (as adjective): a turquoise dress

Etymology: 14th Century: from Old French turqueise Turkish (stone)

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