Circulus foetidus nasi is a Latin phrase which translates to "offensive ring of the nose". The spelling of this word can be a bit tricky as it includes some uncommon vowel combinations. "Circulus" is pronounced as "ˈsɪrkjʊlʊs", while "foetidus" is pronounced as "ˈfiːtɪdʊs". Lastly, "nasi" is pronounced as "ˈneɪzi". Overall, the IPA phonetic transcription helps us understand the correct pronunciation and spelling of this Latin phrase, which describes a foul-smelling discharge from the nose.
C. vasculosus nervi optici.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.