from
The Collaborative International Dictionary of English v.0.48
Sodium bicarbonate \Sodium bicarbonate\,
a white crystalline substance, {HNaCO3}, with a slight
alkaline taste resembling that of sodium carbonate. It is
found in many mineral springs and also produced
artificially,. It is used in cookery, in baking powders, and
as a source of carbonic acid gas (carbon dioxide) for soda
water. Called also {baking soda}, {cooking soda},
{bicarbonate of soda}, {bicarb}, {saleratus}, and
technically, {acid sodium carbonate}, {sodium acid
carbonate}, {primary sodium carbonate}, {sodium dicarbonate},
etc.
[1913 Webster]