-ia

Concise Oxford English Dictionary © 2008 Oxford University Press:
-ia1

▶suffix

• 1 forming nouns adopted from Latin or Greek (such as mania), and modern Latin terms (such as utopia).

• 2 forming names of.

  ■ Medicine states and disorders: anaemia.

  ■ Botany & Zoology genera and higher groups: dahlia.

• 3 forming place names: India.

– origin representing L. or Gk endings.

Concise Oxford English Dictionary © 2008 Oxford University Press:
-ia2

▶suffix forming noun plurals.

• 1 from Greek neuter nouns ending in -ion or from those in Latin ending in -ium or -e: paraphernalia.

• 2 Zoology in the names of classes: Reptilia.