[lahy] 
| 1. | a highly concentrated, aqueous solution of potassium hydroxide or sodium hydroxide. |
| 2. | any solution resulting from leaching, percolation, or the like. |
| lye (lī) n.
[Middle English lie, from Old English lēag; see leu(ə)- in Indo-European roots.] |
| potassium hydroxide n. A caustic white solid, KOH, used as a bleach and in the manufacture of soaps, dyes, alkaline batteries, and many potassium compounds. Also called caustic potash, lye, potash. |
| sodium hydroxide n. A strongly alkaline compound, NaOH, used in the manufacture of chemicals and soaps and in petroleum refining. Also called caustic soda, lye. |
| lye (lī) Pronunciation Key
A strong alkaline solution or solid of potassium hydroxide or sodium hydroxide, made by allowing water to wash through wood ashes. It is used to make soap and drain and oven cleaners. Chemical formula: KOH or NaOH. |
