cochineal : Idioms & Phrases
cochineal fig
Coch"i*neal fig
Definitions
(Bot.) A plant of Central and Southern Anerica, of the Cactus familly, extensively cultivated for the sake of the cochineal insect, which lives on it. 
Webster 1913
cochineal insect
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       noun Mexican red scale insect that feeds on cacti; the source of a red dye
       
       
Dactylopius coccus; cochineal.