Leprolin is a word that is spelled using the International Phonetic Alphabet (IPA) phonetic transcription system. The first syllable of the word, "lep-", is pronounced with an "ɛ" sound, as in "leprous". The second syllable, "-ro-", contains a short "o" sound that is pronounced like "ah". The final syllable, "-lin", is pronounced with a short "i" sound, like "ih". The entire word is pronounced as "leh-proh-lin". Leprolin is a hypothetical protein that is believed to be involved in the development of leprosy.
A glycerin extract of cultures of the lepra bacillus, analogous to tuberculin, employed by Rost in the treatment of leprosy.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.