From Latin -icus, which forms adjectives of belonging or origin.

-ico m. (feminine counterpart -ica)

1. -ic; added to nouns to form adjectives

-ico m, -ica f, -ici m plural, -iche f plural

1. -ic

• See Category:Italian words suffixed with -ico

-icō

1. dative masculine singular of -icus
2. dative neuter singular of -icus
3. ablative masculine singular of -icus
4. ablative neuter singular of -icus

From Latin -icus, which forms adjectives of belonging or origin.

-ico m. (feminine -ica plural -icos feminine plural -icas)

1. -ic; added to nouns to form adjectives

From Latin -icus, which forms adjectives of belonging or origin from a noun.

-ico m. (feminine counterpart -ica)

1. -ic; added to nouns to form adjectives
2. usually derogative diminutive suffix; added to nouns to form nouns

In definition 1, stress will fall on the syllable before the suffix (e.g. cuántico, with emphasis on /a/). For definition 2, stress falls on the first syllable of the suffix (e.g. marica, with emphasis on /i/).