Correct spelling for the English word "arbulith" is [ˈɑːbjʊlˌɪθ], [ˈɑːbjʊlˌɪθ], [ˈɑː_b_j_ʊ_l_ˌɪ_θ] (IPA phonetic alphabet).
Trade name of a mixture of hexamethylenamine lithium benzoate and arbutin, recommended as a urinary antiseptic and uric-acid solvent.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.