What does -ia mean?

-ia meaning in Etymology Dictionary

word-forming aspect in brands of nations, diseases, plants, from Latin and Greek -ia, which forms abstract nouns of feminine sex. In paraphernalia, Mammalia, etc. it signifies the Latin and Greek plural suffix of nouns in -ium or -ion. Chinese types nation names by adding guo "nation" towards the stressed syllable regarding the place-name, therefore Meiguo "The united states," from mei, the anxious syllable of America (minus -r-, which cannot occur in Chinese). Likewise Yingguo "England," Faguo "France." Continent brands are similarly formed, with zhou "continent" (like Meizhou "America (continent)," Feizhou "Africa," Ouzhou "Europe").