The word "meconoisin" is not a word found in any reputable dictionary or linguistic database. Therefore, there is no definitive spelling for this word. However, based on the phonetic transcription of "meconoisin" using the International Phonetic Alphabet (IPA), it appears to be pronounced as /mekənɔɪsɪn/. This suggests that the word might be related to or derived from the word "meconic acid," a chemical compound found in opium. Nonetheless, the spelling and meaning of "meconoisin" cannot be confirmed without further context or evidence.
A neutral principle, C8H10O2, obtained from the mother liquor after the abstraction of meconin; occurs in brown plates or scales.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.