What is the meaning of -ica?

a collection of things that relate to a specific place, person, theme, etc.

female equivalent of -icus

forms nouns from nouns, denoting a science of study; -ics

inflection of -icus:

forms feminine nouns

forms feminine nouns, sometimes diminutive in nature

forms feminine nouns, especially pejoratives and augmentatives

Suffix appended to words to create a feminine noun, commonly used for forming diminutives.

Suffix appended to words to create a masculine or feminine noun, usually a pejorative.

female equivalent of -ik

Source: wiktionary.org

See also