ROAN A specific color pattern consisting of a uniform mixture of colored and white body hairs and a colored head and points; a non-progressive, seldom-dappled color pattern; scarred areas will grow in colored; the coat color changes throughout the year being lightest in the spring and darkest in the winter.
BAY ROAN Any shade of a red coat mixed with white hairs and dark to black points with no white hairs; also known as red roan.
HONEY ROAN A roan pattern on a light sorrel alazán or blond sorrel.
RABAICANO A white color pattern occurring in a number of breeds; may consist of a few white hairs on the flanks and at the base of the tail or a pattern of white hair extending out from the flanks and numerous white hairs at the base of the tail; strongly marked horses may be confused with roans; also known as squaw tail.
Editors note: Rabaicano is not a recognized coat pattern or characteristic of the Appaloosa.
STRAWBERRY ROAN A clear, light red coat uniformly mixed with white hairs, a colored head and colored, non-black points; also known as a sorrel roan.
All definitions are excerpts from Horsewords: The Equine Dictionary By Maria Belknap; Trafalgar Square Publishing; ISBN: 1-57076-274-0.