|Noah Webster's Dictionary|
1. (a.) Of a yellowish or reddish brown color; as, a sorrel horse.
2. (n.) A yellowish or reddish brown color.
3. (n.) One of various plants having a sour juice; especially, a plant of the genus Rumex, as Rumex Acetosa, Rumex Acetosella, etc.
Int. Standard Bible Encyclopedia
sor'-el: the Revised Version (British and American) in Zechariah 1:8 for "speckled."
Sorrel (1 Occurrence)
Zechariah 1:8 I saw in the night, and, behold, a man riding upon a red horse, and he stood among the myrtle-trees that were in the bottom; and behind him there were horses, red, sorrel, and white. (See JPS ASV NAS RSV)