Webster's Revised Unabridged Dictionary · 1913

Leach

Leach , noun

(Nautical) See 3d Leech.

Leach , noun

[Compare As. leáh lye, German lauge. See Lye.]

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.
Collocations (1)
Leach tub , a wooden tub in which ashes are leached.

Leach , transitive verb

[Written also leech and letch.]

1.
To remove the soluble constituents from by subjecting to the action of percolating water or other liquid; as, to leach ashes or coffee.
2.
To dissolve out; -- often used with out; as, to leach out alkali from ashes.

Leach , intransitive verb

To part with soluble constituents by percolation.

Leach , noun

See Leech, a physician. [Obsolete]