Definition of -ae in English:

-ae

Pronunciation: /iː, ʌɪ/

suffix

Forming plural nouns:
1Used in names of animal and plant families and other groups: Felidae Gymnospermae
2Used instead of -as in the plural of many non-naturalized or unfamiliar nouns ending in -a derived from Latin or Greek: striae larvae

Origin

Latin plural suffix, or representing the Greek plural ending -ai.

Definition of -ae in:

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Pronunciation: wiːn
verb
be of the opinion; think or suppose