CACHALOT, noun A cetaceous fish, the physeter or spermaceti whale. The principal species are, the black headed with a dorsal fin, and the round-headed with a dorsal fin, and the round-headed, with out a fin on the back, and with a fistula in the snout. From this whale is obtained the spermaceti.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI