cachalot Meaning, Definition & Usage

  1. noun large whale with a large cavity in the head containing spermaceti and oil; also a source of ambergris
    black whale; Physeter catodon; sperm whale.

WordNet

Cach"a*lot noun
Etymology
F. cachalot.
Definitions
  1. (Zoöl.) The sperm whale (Physeter macrocephalus). It has in the top of its head a large cavity, containing an oily fluid, which, after death, concretes into a whitish crystalline substance called spermaceti. See Sperm whale.

Webster 1913