The Collaborative International Dictionary
Dimorph
Dimorph \Di"morph`\, n. [Gr. ? two-formed; di`s- twice (see Di-) + morfh` form.] (Crystallog.) Either one of the two forms of a dimorphous substance; as, calcite and aragonite are dimorphs.
Wiktionary
dimorph
n. Either of a pair of dimorphous substances