1Forming nouns adopted unchanged from Latin or Greek (such as mania, militia), and modern Latin terms (such as utopia).

2Medicine
Forming names of states and disorders.

1. 2.1Zoology Botany Forming names of genera and higher groups.
   〔植，动〕表示“…属”及以上分类
   dahlia

   Latimeria

3Forming names of countries.

1Forming noun plurals from Greek neuter nouns ending in -ion or from those in Latin ending in -ium or -e.

2Zoology
Forming noun plurals in the names of classes.