The spelling of the word "ulsanin" may seem a bit confusing at first glance. However, when considering the International Phonetic Alphabet (IPA) transcription, the spelling becomes clearer. "Ulsanin" is transcribed as /ʊlˈsanɪn/. This means that the vowel sound in the first syllable is a short "u" sound, the stress is on the second syllable, and the final syllable ends with the consonant sound "n" followed by the vowel sound "ih" (as in "bin"). By understanding the IPA transcription, the spelling of "ulsanin" becomes more understandable.
Trade name of a compound of iodine and boric acid (hydro-iodoborate), employed in the treatment of ulceration in the larynx and elsewhere.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.