Transliteration
In transliteration of Greek into the Latin alphabet, the iota subscript is usually omitted:
- ζῷο-ν "animal" + -λογίᾱ → New Latin zōo-logia (not zōio-logia) → English zoology.
In a few Latin words that were borrowed from Greek at an early date, an old long diphthong is reflected as 〈œ〉, e.g. τραγῳδία → tragœdia, "tragedy".
Read more about this topic: Iota Subscript