Definition of marls:
(n) :
A mixed earthy substance, consisting of carbonate of lime, clay, and possibly sand, in very variable proportions, and accordingly designated as calcareous, clayey, or sandy.
(v) :
(transitive) To cover with the earthy substance called marl.
(n) :
(Australia) A species of bandicoot, Perameles myosurus, of southern Western Australia.
(v) :
(nautical) To cover, as part of a rope, with marline, marking a peculiar hitch at each turn to prevent unwinding.