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1. Pathol affecting a large area of the body
a. (of igneous rocks) having no stratification, cleavage, etc.; homogeneous
b. (of sedimentary rocks) arranged in thick poorly defined strata
3. Mineralogy without obvious crystalline structure
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
Of a mineral deposit, having a large concentration of ore in one place.
Of a mineral, lacking an internal structure.
Of corallum, composed of closely packed corallites.
Of a competent rock, being homogeneous, isotropic, and elastically perfect.
Of a metamorphic rock, having constituents which do not show parallel orientation and are not arranged in layers.
Of igneous rocks, being homogeneous over wide areas and lacking layering, foliation, cleavage, or similar features.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.