Webster's English Dictionary

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cochineal

co.chi.neal \'ka:ch-*-.ne-l, 'ko--ch*-\ n [MF & Sp; MF cochenille, fr. OSp 
   cochinilla wood louse, cochineal] : a red dyestuff consisting of the dried 
   bodies of female cochineal insect s used esp. as a biological stain and as 
   an indicator