sennin

== English == === Etymology === From Senn +‎ -in, after Nicholas Senn (1844-1908), American surgeon. Originally a brand name. === Noun === sennin (uncountable) (medicine, obsolete) An antiseptic preparation made from boric acid, iodine, and phenol. == Japanese == === Romanization === sennin Rōmaji transcription of せんにん