sapphire [saf-ahyuh r]
1. any gem variety of corundum other than the ruby, especially one of the blue varieties.
2. a gem of this kind.
3. the color of this gem, a deep blue.
4. resembling sapphire; deep blue: a sapphire sky.
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Origin: 1225-75; < Latin sapphīrus < Greek sáppheiros, probably < Semitic (compare Hebrew sappīr; ulterior origin obscure); replacing Middle English safir < Old French < Latin, as above
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