idioblastic
/ˌɪdɪə(ʊ)ˈblastɪk/adjective
1 Geology. Designating or relating to a mineral crystal within a metamorphic rock which has developed its own characteristic crystal faces. Also: designating the ordering of minerals according to their relative ability to develop such crystals when occurring together.
2 Botany. Relating to or characteristic of idioblasts in plant tissue; of the nature of an idioblast.
Origin
Early 20th century (in an earlier sense). From idio- + -blastic, after idioblast.