Definition of sei whale
: a widely distributed dark gray baleen whale (Balaenoptera borealis) that has a ridge on the top of the head and may reach a length of nearly 60 feet (18 meters) —called also sei
Origin and Etymology of sei whale
partial translation of Norwegian seihval, from sei coalfish + hval whale
First Known Use: 1912See Words from the same year
Seen and Heard
What made you want to look up sei whale? Please tell us where you read or heard it (including the quote, if possible).