What is the meaning of -ico?

-ic; forms adjectives from nouns

forms nouns from nouns, denoting a person occupied with a science or study; -ic, -ician, -ian

-ic

forms regular first-conjugation verbs, sometimes with frequentative meaning

dative/ablative masculine/neuter singular of -icus

-ic; -ical (of or relating to [the suffixed noun])

irregular diminutive suffix, often forming new senses rather than semantic diminutives

forms adjectives from nouns; -ic

diminutive suffix, pejorative in certain regions; forms nouns from nouns; replaces standard Spanish suffix -ito (in Cuba/Colombia/Venezuela/Costa Rica, it is only used with words that end in /t/, e.g. gato > gatico; but perro > perrito.

Source: wiktionary.org