-ic

1. Of, relating to, or characterized by: seismic.
2. Having a valence higher than that of a specified element in compounds or ions named with adjectives ending in -ous: sulfuric acid.
3. One relating to or characterized by: academic.

[Middle English, from Old French -ique, from Latin -icus and from Greek -ikos.]

1. Of, relating to, or characterized by: carbonic.
2. Having a valence higher than that of a specified element in compounds or ions named with adjectives ending in –ous: ferric.
3. Of or relating to an acid: sulfuric acid.

The adjective has one meaning:

Meaning #1: being nine more than ninety
  Synonyms: ninety-nine, 99

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