Definition of mountain gem in English:

mountain gem

Syllabification: moun·tain gem

noun

A green hummingbird found in the upland forests of Central America.
  • Genus Lampornis, family Trochilidae: several species

Definition of mountain gem in:

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Word of the day guzzle
Pronunciation: ˈgʌz(ə)l
verb
eat or drink (something) greedily