偽三維 [伪－维]

Jyutping ngai6 saam1 wai4
Pinyin wèi sān wéi

Definitions (Wiktionary)
  1. adj, attributive
    2.5D
  2. adj, broadly
    belonging to a grey area between "2D" (anime, etc.) and "3D" (live-action, etc.), such as voice actors