a reddish-brown corona occasionally seen around the sun, caused by volcanic dust in the atmosphere.
(formerly) dibasic. Historical Examples Cooley’s Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades…, Sixth Edition, Volume I Arnold Cooley
- Bi-bi reaction
- Bicarbonate of soda
sodium bicarbonate. noun sodium bicarbonate, esp when used as a medicine or as a raising agent in baking bicarbonate of soda See sodium bicarbonate.