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1. A glacial or alluvial deposit of sand or gravel containing eroded particles of valuable minerals.
2. A place where a placer deposit is washed to extract its mineral content.

[Spanish, shoal, placer, from Catalan placer, shoal, from plassa, place, from Medieval Latin placea; see place.]


(Mining & Quarrying)
a. surface sediment containing particles of gold or some other valuable mineral
b. (in combination): placer-mining.
[C19: from American Spanish: deposit, from Spanish plaza place]


(ˈplæs ər)

1. a natural concentration of heavy metal particles, as gold or platinum, in sand or gravel deposited by rivers or glaciers.
2. the site of a form of mining (plac′er min`ing) in which a placer deposit is washed to separate the gold or other valuable minerals.
[1835–45, Amer.; < American Spanish; Sp: sandbank < Catalan placel, derivative of plaza open place; see plaza]


(ˈpleɪ sər)

1. a person who places or arranges things.
2. one of the winners of a race or other contest.


A deposit of minerals, such as gold or magnetite, left by a river. The minerals are usually concentrated in one area because they are relatively heavy and therefore settle out of the river's currents more quickly than lighter sediments such as silt and sand. When mineral prospectors pan for gold, they look for placer deposits.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.placer - an alluvial deposit that contains particles of some valuable mineralplacer - an alluvial deposit that contains particles of some valuable mineral
alluvial deposit, alluvial sediment, alluvium, alluvion - clay or silt or gravel carried by rushing streams and deposited where the stream slows down
References in periodicals archive ?
Includes Duets with Idina Menzel, Jackie Evancho, Placido Domingo Jr.
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PLACIDO Domingo was probably looking forward to a quiet birthday without any fuss.
THE AMERICAN (15) CAST: George Clooney, Violante Placido, Thekla Reuten, Paolo Bonacelli PLOT: Hitman Jack (Clooney) is the strong silent type, not averse to shooting his girlfriend just in case she betrayed him.
SHOWING: Cineworld & Showcase VERDICT: In the absence of bright colours in the film's palette, Clooney sparks a dazzling screen chemistry in very different ways with Placido and Bonacelli, the latter wearing his dog collar with conviction
THE AMERICAN (15, 104 mins) George Clooney, Violante Placido, Paolo Bonacelli, Johan Leysen, Thekla Reuten, Irina Bjorklund.
In this documentary, Placido Domingo reflects upon what he considers to he the ten greatest operatic roles of his career.