"heuristic" in the noun sense
1. heuristic, heuristic rule, heuristic program
a commonsense rule (or set of rules) intended to increase the probability of solving some problem
"heuristic" in the adjective sense
1. heuristic
of or relating to or using a general formulation that serves to guide investigation
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License