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castoreum

[ka-stawr-ee-uh m, -stohr-] /kæˈstɔr i əm, -ˈstoʊr-/
noun
1.
castor1 (def 1).
Origin of castoreum
< Latin < Greek kastórion, equivalent to kastor- (stem of kástōr) beaver + -ion, neuter of -ios adj. suffix
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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