noun Chemistry, Pharmacology.
Examples from the Web for betaine
A hydrochlorate, a sulphate, an aurochloride, and a platinic chloride of betaine have been prepared.
It is a product of the decomposition of choline, betaine, and neuridine, when these substances are distilled with potash.Poisons: Their Effects and Detection|Alexander Wynter Blyth
Betaine and choline often occur together in the germs of many plants.The Chemistry of Plant Life|Roscoe Wilfred Thatcher