word-forming element indicating "branch of knowledge, science," now the usual form of -logy. Originally used c.1800 in nonce formations (commonsensology, etc.), it gained legitimacy by influence of the proper formation in geology, mythology, etc., where the -o- is a stem vowel in the previous element.

Nearby words

  1. -oidea,
  2. -ol,
  3. -ola,
  4. -ole,
  5. -ologist,
  6. -oma,
  7. -ome,
  8. -on,
  9. -one,
  10. -onic
Online Etymology Dictionary, © 2010 Douglas Harper