GNU Collaborative International Dictionary of English

last match results

Found 4 definitions

1.       
   Greensand (-săndˌ), n. (Geol.) A variety of sandstone, usually imperfectly consolidated, consisting largely of glauconite, a silicate of iron and potash of a green color, mixed with sand and a trace of phosphate of lime.
   
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    ☞Greensand is often called marl, because it is a useful fertilizer. The greensand beds of the American Cretaceous belong mostly to the Upper Cretaceous.
   
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2.       
   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.
   
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   Marling spike. (Naut.) See under Marline.
   
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3.       
   Marl, n. [OF. marle, F. marne, LL. margila, dim. of L. marga marl. Originally a Celtic word, according to Pliny, xvii. 7: “Quod genus terrae Galli et Britanni margam vocant.” √274.] 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.
   
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4.       
   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”.
   
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