| leach | See Leech, a physician. 1. A quantity of wood ashes, through which water passes, and thus imbibes the alkali. 2. A tub or vat for leaching ashes, bark, etc. Leach tub, a wooden tub in which ashes are leached. Origin: Cf. As. Leah lye, G. Lauge. See Lye. Source: Websters Dictionary (01 Mar 1998) |
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| leach tube | A reusable cone-shaped plastic container used for growing seedlings for revegetation work, the containers can be mounted in a rack for easy transport and were named after Ray Leach, who invented them in Oregon. (09 Oct 1997) |
| leachate | Solution of material leached from a solid (for example, dissolved organic matter leached from fallen leaves). (09 Oct 1997) |
| leachates | Liquids percolated through waste piles. Leachate can include various minerals, organic matter, or other contaminants and can contaminate surface water or ground water. (05 Dec 1998) |
| leaching | Removal of valuable metals form ores by microbial action. (09 Oct 1997) |