\Marl\, v. t. [See {Marline}.] (Naut.)
To cover, as part of a rope, with marline, marking a pecular
hitch at each turn to prevent unwinding.
{Marling spike}. (Naut.) See under {Marline}.

\Marl\, n. [OF. marle, F. marne, LL. margila, dim. of L.
marga marl. Originally a Celtic word, according to Pliny,
xvii. 7: ``Quod genus terr[ae] Galli et Britanni margam
vocant.'' [root]274.]
A mixed earthy substance, consisting of carbonate of lime,
clay, and sand, in very varivble proportions, and accordingly
designated as calcareous, clayey, or sandy. See {Greensand}.

\Marl\, v. t. [imp. & p. p. {Marled}; p. pr. & vb. n.
{Marling}.] [Cf. F. marner. See {Marl}, n.]
To overspread or manure with marl; as, to marl a field.