English
acter
From act + -er (“person or thing to which a certain number or measurement applies”).
Formed from act + -er ‘person or thing to which a certain number or…’
Proto-Indo-European *h₂eǵ-
…
Latin āctum ‘decree, law’
Latin ācta ‘register of events’
Old French acte
Middle English acte ‘an act’
English act
Today it means
noun A play or film with a particular number of acts.
Language periods are conventional ranges, not dates for this word.
Etymograph / acter