プログレッシブ和英中辞典(第4版)の解説
たいせき【堆積】
(an) accumulation, a pile；〔地質学で〕sedimentation
堆積する pile [build] up; accumulate
道路の泥の堆積をかたづけた
They cleared the streets of the (heaps of) mud.／They removed the mud which had accumulated on the roads.
膨大な資料が堆積していた
A huge amount of data had accumulated [piled up].／《口》 There were heaps of materials.
堆積岩
a sedimentary rock
堆積物
sediment; a deposit