Definitions

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

  • suffix Used to form adjectives from nouns: ammoniac.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • suffix One affected with.

Etymologies

New Latin -acus, from Greek -akos.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From French -acque, from New Latin -acus, from Ancient Greek -ακός (-akos, "-ic"), -ακή (akē), -ακόν (-akon). (Wiktionary)

Examples

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