combining form of mod.L. zygomaticus ZYGOMATIC, forming adjs. in sense ‘belonging to the zygoma or zygomatic arch and (some other part),’ as zygomatico-auricular (see quot.).
1890. Billings, Med. Dict., Zygomatico-auricular index, ratio between the bizygomatic and the biauricular diameters of the cranium.
