-ica
Origin
Latin -ica ("(plural suffix)"), plural form of -icum ("(singular suffix)").
Note that etymologically this is not -ic + -a ("(plural ending)"), as -ic is the English form, having dropped the -um, though adding an -a to an English word ending in -ic does produce a superficially etymologically correct Latinate form.
Full definition of -ica
Suffix
- a collection of things that relate to a specific place, person, theme, etc.
Usage notes
Not productive, and rarely used; -ana and -ia are more common.