adjective 1.Also, euhedral. (in a rock) noting or pertaining to a mineral constituent having its own characteristic outward crystalline form unaltered by the other constituents of the rock; automorphic.
2.having its own characteristic form.
Origin: 1885–90; <
Greek idiómorph(
os) having an individual form (see
idio-,
-morphous) +
-ic Related forms id·i·o·mor·phi·cal·ly, adverb
id·i·o·mor·phism, noun