Dactylopius coccus dac·ty·lo·piuscoccus uncommon noun 1. Mexican red scale insect that feeds on cacti; the source of a red dye Synonymscochineal insectcochinealDactylopius coccus Related words Broader terms scale insect Parts Dactylopius WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.