- a rorqual, Balaenoptera borealis, inhabiting all seas: now greatly reduced in number.
Origin of sei whale
1915–20; < Norwegian seihval, equivalent to sei (Old Norse seithr) coalfish + hval whale1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a rorqual, Balaenoptera borealis
C20: from Norwegian seihval, from sei coalfish (see saithe) + hval whale: so called because it follows coalfish in search of food