Definition of

D Region

  1. (noun, location) the lowest region of the ionosphere (35 to 50 miles up) that reflects low-frequency radio waves

via WordNet, Princeton University

Synonyms of D Region

d-layer

Note: If you're looking to improve your vocabulary right now, we highly recommend Ultimate Vocabulary Software.

Word of the Moment

Purkinje

Bohemian physiologist remembered for his discovery of Purkinje cells and the Purkinje network (1787-1869)