adj.
Pronunciation: -tü- ' nis-tik, -tyü-
Function: adjective
Date: 1892
: taking advantage of opportunities as they arise: as a : exploiting opportunities with little regard to principle or consequences <a politician considered opportunistic > b : feeding on whatever food is available < opportunistic feeders> c : being or caused by a usually harmless microorganism that can become pathogenic when the host's resistance is impaired < opportunistic infections>
– op · por · tu · nis · ti · cal · ly \ -ti-k( ə -)l ē \ adverb