Stuck on a problem? Get great tutoring at an affordable price with Chegg
to join and get your 1st 30 minutes Free!
From Biology-Online Dictionary
(Science: zoology) A genus of cetaceans having a long, pointed, bony beak, usually two tusklike teeth in the lower jaw, but no teeth in the upper jaw.
Origin: NL, fr. Gr. Xifos a sword.