n. 砂矿, 砂矿开采地, 放置者, 得名次者

[ noun ]
an alluvial deposit that contains particles of some valuable mineral
<noun.object>

Placer \Pla"cer\, n.
One who places or sets. --Spenser.


Placer \Plac"er\, 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.]