Definition of "natron" [na•tron]

• A mineral of hydrous sodium carbonate, Na2CO3·10H2O, often found crystallized with other salts. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The dealers in tobacco also sell natron, which is brought from"
• "(It is true that though copper can be melted the agent in its case is not water, but some of the bodies that can be melted by water too such as natron and salt cannot be softened in water: for nothing is said to be so affected unless the water soaks into it and makes it softer.)"
• "As, however, it appears in (Jeremiah 2: 22) in contradistinction to nether, which undoubtedly means "natron" or mineral alkali, it is fair to infer that borith refers to vegetable alkali, or some kind of potash, which forms one of the usual ingredients in our soap."