noun, plural krill.
- any of the small, pelagic, shrimplike crustaceans of the family Euphausiidae, eaten as food by certain whales.
noun plural krill
- any small shrimplike marine crustacean of the order Euphausiacea : the principal food of whalebone whales
1907, from Norwegian kril “small fry of fish.”
- Small crustaceans that float in the ocean in huge numbers and are one of the most important parts of zooplankton. Krill are the main food of baleen whales.