(1) A nonspecific term for any condition that affects multiple arteries. (2) Polyarteritis nodosa, see there. (pol'Ä-ahr'tÄr-Ä«'tis) Simultaneous inflammation of a number of arteries. inflammatory and degenerative lesions of the arterial walls in a number of isolated locations.
The Border Collie comes in two coat varieties: rough or smooth. Both varieties are double coat and weather resistant and are close fitting and thick. The outer coat is either wavy or straight and coarse in texture. The under coat is dense, short, and soft. The rough coat variety has fur of medium length.
An additional colour is white (these Collies are predominantly white, with heads and usually a body spot of sable, tri, or blue colour). The fourth colour is sable merle, which is a light stippled version of sable, sometimes (as with blue merle) accompanied by blue or merled (parti-coloured) eyes.