Definition of pseudo-ray in English:

pseudo-ray

noun

Optics
  • A ray with abnormal properties that arises in the course of certain calculations; specifically one that does not obey Snell's law of refraction.

Origin

Late 19th century (in an earlier sense). From pseudo- + ray.

Pronunciation

pseudo-ray

/ˈs(j)uːdə(ʊ)reɪ/