marl1
n.
an unconsolidated sedimentary rock or soil consisting of clay and lime, formerly used as fertilizer.
v.
apply marl to.
Derivative
Etymology
ME: from OFr. marle, from med. L. margila, from L. marga, of Celtic origin.
marl2
n.
a mottled yarn or fabric.
Derivative
Etymology
C19: shortening of marbled.