Ioterpin is a word with an unusual spelling. It is pronounced 'aɪoʊtɜrpɪn' and is pronounced with stress on the second syllable. The word does not appear in any standard dictionary and may have been coined for a specific purpose or used in a specialized field. The spelling of ioterpin suggests it may be a compound word made up of io and terpin or terpinol, which are organic compounds commonly found in essential oils. The exact meaning of ioterpin, however, remains unclear.
Iodoterpin.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.