bicarb/ˈbaɪˌkɑɹb/EtymologyClipping of bicarbonate.bicarb means bicarbonate (HCO₃⁻). Lexicurio rates it Sui generis — a strength score of 91 out of 100.nounBicarbonate (HCO₃⁻).Sodium bicarbonate (NaHCO₃).