|Noah Webster's Dictionary|
1. (n.) The bile; -- formerly supposed to be the seat and cause of irascibility.
2. (n.) Irritation of the passions; anger; wrath.
Int. Standard Bible Encyclopedia
kol'-er: Lit. "bile," is used in the sense of a disease (cholera) (Sirach 31:20; 37:30), and in the sense of bitter anger (marar) (Daniel 8:7; Daniel 11:11 English Versions of the Bible, the American Standard Revised Version "anger").
Choler (2 Occurrences)
Daniel 8:7 And I saw him come close unto the ram, and he was moved with choler against him, and smote the ram, and brake his two horns: and there was no power in the ram to stand before him, but he cast him down to the ground, and stamped upon him: and there was none that could deliver the ram out of his hand. (KJV JPS)
Daniel 11:11 And the king of the south shall be moved with choler, and shall come forth and fight with him, even with the king of the north: and he shall set forth a great multitude; but the multitude shall be given into his hand. (KJV JPS)