Webster’s Revised Unabridged Dictionary · 1913
Placer
Pla′cer (plā′sẽr), n. One who places or sets. Spenser.
Plac′er (plăs′ẽr; Sp. plȧ·thĕr′), n. [Sp.] A deposit of earth, sand, or gravel, containing valuable mineral in particles, especially by the side of a river, or in the bed of a mountain torrent. [U.S.]