from The American Heritage® Dictionary of the English Language, 4th Edition

  • suffix Having a specified kind or number of parts: isomerous.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • suffix Having parts of the specified quality.
  • suffix Comprising the specified number of parts.


From New Latin -merus, from Greek -meros, from meros, part; see (s)mer-2 in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From the suffixation of the French -mère and its etymon the Ancient Greek -μερής (-merēs) (“having (the specified number of) parts”, “sharing”: the combining form of μέρος (meros, "part")) with the English -ous; compare the English -mer and -mere, as well as the French -mère and the German -mer. (Wiktionary)


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