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Plural of actus

irregular plural

The plural of actus is actus or acti.

Forms of actus

Singular	actus /ˈæktəs/
Plural	actus /ˈæktəs/ acti
Countable	countable

Meaning of actus

noun A former Roman unit of length, equal to 120 Roman feet (about 35.5 m).
noun A former Roman unit of area, equivalent to a square with sides of 1 actus (about 0.125 ha).

Full definition of actus

Plural the same as the singular

sheep (sheep)
deer (deer)
fish (fish)
aircraft (aircraft)
series (series)
species (species)
offspring (offspring)
salmon (salmon)
moose (moose)
bison (bison)
swine (swine)
trout (trout)

Questions about the plural of actus

What is the plural of actus?: The plural of actus is actus or acti.
Is actus countable?: Actus is a countable noun.

Adapted from Wiktionary: actus (page history and authors) and the entries of its forms. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws left out forms marked obsolete, archaic, rare or dialectal and added the examples. Wiktionary data of 2026-09-02.

Last updated: 2026-09-02

Cite this page: “Plural of actus.” Word.ws, https://word.ws/plural/actus. Based on Wiktionary, CC BY-SA 4.0.