bicarbonate

n. baking soda

For baking soda, see Sodium bicarbonate In inorganic chemistry, a bicarbonate (IUPAC-recommended nomenclature: hydrogencarbonate) is an intermediate form in the deprotonation of carbonic acid.
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Noun
1. a salt of carbonic acid (containing the anion HCO3) in which one hydrogen atom has been replaced; an acid carbonate
(synonym) hydrogen carbonate
(hypernym) carbonate
(hyponym) bicarbonate of soda, sodium hydrogen carbonate, sodium bicarbonate, baking soda, saleratus

n. bicarbonate

(n.)
A carbonate in which but half the hydrogen of the acid is replaced by a positive element or radical, thus making the proportion of the acid to the positive or basic portion twice what it is in the normal carbonates; an acid carbonate; -- sometimes called supercarbonate.