漫反射

mànfǎnshè
  1. (optics) diffuse reflection
  2. diffuse reflection

Wiktionary

Entry Composition

1 漫 màn
  1. free
  2. unrestrained
  3. to inundate
2 反射 fǎnshè
  1. to reflect
  2. reflection (from a mirror etc)
  3. reflex (i.e. automatic reaction of organism)