Ornitho is defined as bird.
An example of the ornitho prefix is ornithophobia, meaning a fear of birds.
bird or birds: ornithology
also, before a vowel, ornith-
Origin of ornitho-from Classical Greek ornis (gen. ornithos), bird from Indo-European base an unverified form er-, eagle, large bird from source Gothic ara
Origin of ornitho-New Latin ornītho- from Greek from ornīs ornīth- bird ; see or- in Indo-European roots.