a slender, ferretlike carnivore, Herpestes edwardsi, of India, that feeds on rodents, birds, and eggs, noted esp. for its ability to kill cobras and other venomous snakes.
2.
any of several other animals of this genus or related genera.
Origin: 1690–1700; < Marathi mangūs, var. of muṅgūs
mon·goose (mŏng'gōōs', mŏn'-) n.
pl.mon·goos·es Any of various Old World carnivorous mammals of the genus Herpestes and related genera, having a slender agile body and a long tail and noted for the ability to seize and kill venomous snakes.
"snake-killing ichneumon of India," 1698, perhaps via Port., from an Indic language (cf. Mahrathi mangus "mongoose"), probably ult. from Dravidian (cf. Telugu mangisu, Kanarese mungisi). The form of the Eng. word altered by folk-etymology.