WordNet
v. be sustained by; "He fed on the great ideas of her mentor" [syn: feed on]
Usage examples of "feed upon".
When they hatch, the larvae - little white hairy worms - find and feed upon the dried faecal blood of the parent fleas (which has also fallen off the host), dirt and debris.
As the skilled workmen cut, they frequently paused for sport and skshed their deadly knives deep into some shark that had come to feed upon the carcass, and when the knife was withdrawn the shark would twist slightly, as if a bee had stung him, and continue feeding.
And one of them was this--how to take the life force of something, someone, and feed upon it, without killing it.
He had intended to feed upon Sir William, leaving him weak and easy prey for the captain's men but Sir William obviously had no intention of leaving the table while his luck held.
Somehow, despite all his efforts and his deepest wishes, his mind slipped from his task, and loneliness came to feed upon him once more.