海かい底てい堆たい積せき物ぶつMeaningsNoun1. marine sedimentKanji used海sea底bottom堆piled high積pile up and accumulate物thingComposed of海かい底ていbottom of the ocean; seafloor; seabed; undersea; submarineNoun堆たい積せきaccumulation; pile; heap; sedimentationNoun物ぶつstock; productsNoun