| Word | Definitions | Synonyms |
|---|---|---|
| heulandite | (noun) a group of minerals of the zeolite family consisting of a hydrous aluminum silicate of sodium and calcium | - |
| heuristic | (adjective) of or relating to or using a general formulation that serves to guide investigation | - |
| (noun) a commonsense rule (or set of rules) intended to increase the probability of solving some problem | Synonyms: heuristic program, heuristic rule |