/mar"euhm/
a grass, Ammophila arenaria, having matted, creeping rhizomes, grown on sandy shores of Europe, North America, and Australia to bind the sand. Also called marram .
[ 1630-40; orig. East Anglian dial.; marálmr, equiv. to marr sea (see MERE 2 ) + hálmr grass (see HAULM) ]