| Word | American Tract Society - Definition |
| NITRE | Not the substance used in making gunpowder, but natron, a mineral alkali composed of several salts of soda. It effervesces with vinegar, Pr 25:28, and is still used in washing, Jer 2:22. Combined with oil, it makes a hard soap. It is found deposited in, or floating upon, certain lakes west of the Delta of Egypt. |