serioj

Serioj is a noun in Esperanto, representing the plural of serio, which means series or sequence. In Esperanto, serio is used for any ordered set of items, and serioj denotes multiple such series. The word follows the language’s regular plural formation, with -oj indicating the nominative plural.

In mathematical and scientific contexts, serio refers to a sequence or a series of numbers, and serioj can be used to talk about multiple such series. More broadly, serioj can describe any collection of items arranged in a particular order or published in installments, such as a set of related works, a publication run, or a sequence of events.

In literature and media, serioj commonly describe works developed as a connected progression or a group of related titles, such as a book series, a magazine serial, or episodes within a television series. The term emphasizes continuity and order across the items it encompasses.

Etymology and cognates: Serio traces to Latin series and is cognate with similar words in many Romance languages (for example, serie in Italian and French série). The Esperanto form serioj reflects a standard plural pattern in the language, where many root nouns ending in -io or -o take -oj in the plural.

See also: serio, serialo. Notes: Esperanto uses -oj for nominative plural; context determines whether serioj means mathematical series, narrative series, or another ordered collection.