/ mɑːl; NAmE mɑːrl/ noun
1.
[ U , C ] soil consisting of clay and lime (1)
2.
[ U ] a type of cloth with threads in it that are not of an even colour :
blue marl leggings
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WORD ORIGIN
sense 1 Middle English : from Old French marle , from medieval Latin margila , from Latin marga , of Celtic origin.
sense 2 late 19th cent.: shortening of marbled .