sperm whale spermw·hale uncommon noun 1. large whale with a large cavity in the head containing spermaceti and oil; also a source of ambergris Synonymssperm whalecachalotblack whalePhyseter catodon Related words Broader terms toothed whale Parts Physeter WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
