Definition of pearlfish

  1. 1 [so called from its inhabiting the mantle cavity of the pearl oyster] :  a fish of the family Carapidae and especially of the genus Carapus

  2. 2 :  pearlsides

  3. 3 :  any of various cyprinoid and clupeoid fishes having scales which yield pearl essence

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to cast off or become cast off

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