Perdiccas pərdĭkˈəs [key], d. 321 b.c., Macedonian general under Alexander the Great. After the death of Alexander (323) he ruled as regent from Babylon. He strove in vain to hold the empire together, but was opposed by others of the Diadochi. He was defeated by Ptolemy I in Egypt and was killed in a mutiny of his troops.

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