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The Collaborative International Dictionary
Poecilitic

Poecilitic \P[oe]`ci*lit"ic\, a. [Gr. poiki`los many-colored, variegated.] (Geol.)

  1. Mottled with various colors; variegated; spotted; -- said of certain rocks.

  2. Specifically: Of or pertaining to, or characterizing, Triassic and Permian sandstones of red and other colors.

Wiktionary
poecilitic

a. 1 (context geology English) mottle with various colours; variegated; spotted. 2 (context geology specifically English) Of or relating to, or characterizing, Triassic and Permian sandstones of red and other colours.