The Collaborative International Dictionary
altheine
Asparagine \As*par"a*gine\, n. [Cf. F. asparagine.] (Chem.) A white, nitrogenous, crystallizable substance, C4H8N2O3+H2O, found in many plants, and first obtained from asparagus. It is believed to aid in the disposition of nitrogenous matter throughout the plant; -- called also altheine.
Wiktionary
altheine
n. (context organic compound English) asparagine