poecilitic

Century Dictionary and Cyclopedia

1. n. A name suggested by Conybeare as an equivalent for New Red Sandstone, in allusion to its variegated color, the rocks of which this group is made up consisting chiefly of red, yellow, and variegated sandstones, conglomerates, and marls, with occasional beds of limestone. See sandstone, Permian, and New Red Sandstone (under sandstone).
2. n. In petrography, a term used by G. H. Williams in 1886 (in the form poikilitic) to designate the texture of those igneous rocks in which comparatively large crystals act as a matrix for many smaller ones, which are included in the larger ones, and, when these are cleavable, produce luster-mottling.

Wiktionary

1. adj. geology Mottled with various colours; variegated; spotted.
2. adj. geology, specifically Of or relating to, or characterizing, Triassic and Permian sandstones of red and other colours.

GNU Webster's 1913

1. adj. Mottled with various colors; variegated; spotted; -- said of certain rocks.
2. adj. Specifically: Of or pertaining to, or characterizing, Triassic and Permian sandstones of red and other colors.