Marl1. (v. t.) To cover, as part of a rope, with marline, marking a peculiar hitch at each turn to prevent unwinding.
2. (n.) A mixed earthy substance, consisting of carbonate of lime, clay, and sand, in very variable proportions, and accordingly designated as calcareous, clayey, or sandy. See Greensand.
3. (n.) To overspread or manure with marl; as, to marl a field.
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