The word "kryogenin" is spelled with a "k" instead of a "c" because it is derived from the Greek word "kryos," meaning cold. The "g" is used to represent the hard "g" sound in the middle of the word, which is followed by the letter "e," representing the short "e" sound. The final syllable, "-genin," is spelled as it sounds, with a soft "g" sound, long "e," and the letter "n." The IPA phonetic transcription for this word is /kraɪoʊˈdʒɛnɪn/.
Cryogenin.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.