Lye
Lye , noun
[Anglo-Saxon leáh; akin to Dutch loog, Old High German louga, German lauge; compare Icelandic 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.
2.
(Chemistry) Sodium hydroxide or potassium hydroxide, or a concentrated aqueous solution of either compound.
Lye , noun
(Railroad) A short side line, connected with the main line; a turn-out; a siding. [English]
Lye , noun
A falsehood. [Obsolete]