Definition of -ac in English:

-ac

Syllabification: -ac

suffix

Forming adjectives that are also often (or only) used as nouns, such as maniac. Compare with -acal.

Origin

from Greek -akos via Latin -acus or French -aque.

Definition of -ac in:

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Word of the day iconoclasm
Pronunciation: ʌɪˈkɒnəklaz(ə)m
noun
attacking or rejecting cherished beliefs or established values...