from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A crumbly mixture of clays, calcium and magnesium carbonates, and remnants of shells that is sometimes found under desert sands and used as fertilizer for lime-deficient soils.
- transitive v. To fertilize with such a mixture.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A mixed earthy substance, consisting of carbonate of lime, clay, and possibly sand, in very variable proportions, and accordingly designated as calcareous, clayey, or sandy.
- v. To cover, as part of a rope, with marline, marking a peculiar hitch at each turn to prevent unwinding.
from the GNU version of the Collaborative International Dictionary of English
- 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.
- transitive v. To cover, as part of a rope, with marline, marking a pecular hitch at each turn to prevent unwinding.
- transitive v. To overspread or manure with marl.
from The Century Dictionary and Cyclopedia
- To overspread or manure with marl.
- Nautical, to wind, as a rope, with marline, spun-yarn, twine, or other small stuff, every turn being secured by a sort of hitch: a common method of fastening strips of canvas called parceling, to prevent chafing.
- To ravel, as silk.
- To wonder; marvel.
- See the quotation.
- n. A mixture of clay with carbonate of lime, the latter being present in considerable quantity, forming a mass which is not consolidated, but falls to pieces readily on exposure to the air.
- n. The fiber of those peacock-feathers which have the webs long and decomposed, so that the barbs stand apart, as if raveled: used for making artificial flies.
- n. Marble.
- n. A marble (plaything).
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a loose and crumbling earthy deposit consisting mainly of calcite or dolomite; used as a fertilizer for soils deficient in lime
But what (hall I fay if our whitifh foft clay grounds (whence is fometimes digged, what we call marl for manure of our lands) do grow f Ilhall relate a ftory that may fcem to give coun - tenance hereunto.
Closely associated with limestone in commercial uses, as well as in chemical composition, is calcareous marl, which is used extensively in the manufacture of Portland cement.
Many of the hills of Warren County, in which Vicksburg is situated, are composed of a curious soft limy clay, called marl, which, normally, has not the solidity of soft chalk.
They are, like the lands of the first class, of very easy tillage; and one good application of the marl, which is found in this section in exhaustless quanties, will add to their productiveness for twenty years.
A Guide to Capitalists and Emigrants: Being a Statistical and Descriptive Account of the Several Counties of the State of North Carolina, United States of America; Together with Letters of Prominent Citizens of the State in Relation to the Soil, Climate, Productions, Minerals, &C., and an Account of the Swamp Lands of the State
The subsoil at Varrains being largely composed of marl, which is much softer than the tufa of the Saint-Florent coteau, necessitated the roofs of the new galleries being worked in a particular form in order to avoid having recourse to either brickwork or masonry.
Guano has not been extensively used in New Jersey, owing to the abundance of green sand marl, which is a very valuable fertilizer, abounding in that part of the State most in need of artificial manures.
There is alfo found a certain kind of fat clay, called marl, both white and red, which they dig up and fpread upon their arable ground, which maketh it more rank, and bringeth corn in as great abundance as that which is dunged.
(J.B. *; W.B. *)  The term "marl" has been wrongly applied to many fire-clays.
For ordinary building operations there is a material -- a kind of marl-stone called _Adobe_ -- so soft when quarried that it can be cut out in small blocks with a hand-saw, but it hardens considerably on exposure to the air.
For, beside the compest that is carried out of the husbandmen's yards, ditches, ponds, dung-houses, or cities and great towns, we have with us a kind of white marl which is of so great force that if it be cast over a piece of land but once in threescore years it shall not need of any further compesting.