alluvial deposit

Từ điển WordNet v3.1 - WordNet Dictionary

noun

clay or silt or gravel carried by rushing streams and deposited where the stream slows down
• Syn:
alluvial sediment, alluvium, alluvion
• Derivationally related forms:
alluvial (for: alluvium)
• Hypernyms:
sediment, deposit
• Hyponyms:
delta, placer
• Substance Meronyms:
alluvial soil