| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
| the offspring of a zebra and a donkey. |
opportunistic op·por·tun·is·tic (ŏp'ər-t&oomacr;-nĭs'tĭk, -ty&oomacr;-)
adj.
Of or relating to an organism capable of causing disease only in a host whose resistance is lowered.
Of or relating to a disease caused by an opportunistic organism.