Correct spelling for the English word "largin" is [lˈɑːd͡ʒɪn], [lˈɑːdʒɪn], [l_ˈɑː_dʒ_ɪ_n] (IPA phonetic alphabet).
A trade name for a combination of silver and paranucleo-protein, silver albuminate or protalbinate; a gray powder, soluble in 9 parts of water and containing 11 parts of metallic silver; said to be relatively non-irritating and of high penetrating power.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.