Definition of Ogallala Aquifer in English:

Ogallala Aquifer

Syllabification: O·gal·la·la Aq·ui·fer
Pronunciation: /ˌōɡəˌlälə ˈäkwəfər
 
/
A vast groundwater resource under eight US states, used especially for crop irrigation, that stretches from southern South Dakota to western Texas and eastern New Mexico.

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Word of the day neoteny
Pronunciation: nēˈätn-ē
noun
retention of juvenile features in the adult animal