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Wordnet 3.0

NOUN (1)

1. a strong solution of sodium or potassium hydroxide;


The Collaborative International Dictionary of English v.0.48:

Lye \Lye\, n. A falsehood. [Obs.] See Lie. [1913 Webster]
The Collaborative International Dictionary of English v.0.48:

Lye \Lye\, n. [Written also lie and ley.] [AS. le['a]h; akin to D. loog, OHG. louga, G. lauge; cf. Icel. laug a bath, a hot spring.] 1. A strong caustic alkaline solution of potassium salts, obtained by leaching wood ashes. It is much used in making soap, etc. [1913 Webster] 2. (Chem.) Sodium hydroxide or potassium hydroxide, or a concentrated aqueous solution of either compound. [PJC]
The Collaborative International Dictionary of English v.0.48:

Lye \Lye\, n. (Railroad) A short side line, connected with the main line; a turn-out; a siding. [Eng.] [1913 Webster]
WordNet (r) 3.0 (2006):

lye n 1: a strong solution of sodium or potassium hydroxide