There are 2 definitions of -ia in English:

-ia1

Syllabification: -ia

suffix

1Forming nouns adopted unchanged from Latin or Greek (such as mania, militia), and modern Latin or Greek terms (such as utopia).
2Forming names of.
2.1 Medicine States and disorders: anemia diphtheria
2.2 Botany & Zoology Genera and higher groups: dahlia Latimeria
3Forming names of countries: India

Origin

representing Latin or Greek endings.

Definition of -ia in:

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Word of the day epyllion
Pronunciation: ɪˈpɪlɪən
noun
a narrative poem resembling an epic in style...

There are 2 definitions of -ia in English:

-ia2

Syllabification: -ia

suffix

Forming noun plurals:
1From Greek neuter nouns ending in -ion or from those in Latin ending in -ium or -e: paraphernalia regalia
2 Zoology In the names of classes: Reptilia

Definition of -ia in: