Pronunciation: (hûr"kyu-lē'un, hûr-kyOO'lē-un), [key]
1. requiring the great strength of a Hercules; very hard to perform: Digging the tunnel was a herculean task.
2. having enormous strength, courage, or size.
3. (cap.) of or pertaining to Hercules or his labors.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.