caucasian : Idioms & Phrases
caucasian language
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noun a number of languages spoken in the Caucasus that are unrelated to languages spoken elsewhere
Caucasian.
WordNet
caucasian race
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noun a light-skinned race
Caucasoid race; White race; White people.
WordNet
caucasian walnut
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noun medium-sized Caucasian much-branched tree distinguished from other walnut trees by its winged fruit
Pterocarya fraxinifolia.