IPA: /ˌɛpɪˈtæksi/
KK: /ɛpɪˈtæksi/
The process of growing crystals of one material on the surface of another material, where both have the same crystal structure.
Epitaxy is often used in the production of semiconductors to create layers of materials with specific properties.
Epitaxy → It is formed from "epi-" (meaning upon or over) and "taxis" (from Greek "taxis", meaning arrangement or order). The word describes the process of growing a crystalline layer on a substrate in a specific orientation, hence the idea of arrangement upon another layer.
Think of 'upon' ('epi-') and 'arrangement' ('taxis') to remember that epitaxy refers to the arrangement of a layer upon another.