Definition of -ution in English:

-ution

Pronunciation: /ˈjuːʃ(ə)n, ˈuːʃ(ə)n/

suffix

(Forming nouns) equivalent to -ation (as in solution).

Origin

via French from Latin -utio(n-).

Definition of -ution in:

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Word of the day neoteny
Pronunciation: niːˈɒt(ə)ni
noun
retention of juvenile features in the adult animal