Meaning of center-pivot irrigation

cen'ter-piv•ot irriga'tion

Pronunciation: (sen'tur-piv"ut), [key]
  1. a method of irrigation, used mainly in the western U.S., in which water is dispersed through a long, segmented arm that revolves about a deep well and covers a circular area from a quarter of a mile to a mile in diameter.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.