Mon·goose, Mon·goos  n.; pl. Mongooses
  1. Zool. A species of ichneumon (Herpestes griseus), native of India.  Applied also to other allied species, as the African banded mongoose (Crossarchus fasciatus). [Written also mungoose, mungoos, mungous.]
  2.  A Madagascan lemur (Lemur mongos).
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