Definition of -ales in English:

-ales

Pronunciation: /ˈeɪliːz/

suffix

Botany
Forming the names of orders of plants: Rosales

Origin

from the plural of the Latin adjectival suffix -alis (see -al).

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Word of the day setose
Pronunciation: ˈsiːtəʊs
adjective
bearing bristles or setae; bristly