-ales

Botany.

1. a suffix of names of orders:

   Cycadales.

-ales

suffix forming plural proper nouns

1. denoting plants belonging to an order

   Filicales

   Rosales

Word History and Origins

Origin of -ales¹

< Latin plural of -ālis -al ¹

Word History and Origins

Origin of -ales¹

New Latin, from Latin, plural of -ālis -al ¹