reflexion

See Reflection. Chaucer.

The noun has 7 meanings:

Meaning #1: the phenomenon of a propagating wave (light or sound) being thrown back from a surface
  Synonym: reflection

Meaning #2: expression without words
  Synonyms: expression, manifestation, reflection

Meaning #3: a remark expressing careful consideration
  Synonyms: observation, reflection

Meaning #4: a calm lengthy intent consideration
  Synonyms: contemplation, reflection, rumination, musing, thoughtfulness

Meaning #5: the ability to reflect beams or rays
  Synonyms: reflection, reflectivity

Meaning #6: a likeness in which left and right are reversed
  Synonyms: mirror image, reflection

Meaning #7: the image of something as reflected by a mirror (or other reflective material)
  Synonym: reflection