nésimas

Nésimas is the feminine plural form of the ordinal adjective n-ésima, used in Spanish and Portuguese to indicate the nth item in a sequence when the noun that follows is feminine. It is formed from the numeral n combined with the feminine suffix -ésima, and is commonly written without a hyphen in running text as n-ésimas (though some styles prefer the hyphenated form n-ésimas).

In everyday language, n-ésimas appears with feminine nouns, for example: la n-ésima parte (the nth part), la n-ésima posición, or las n-ésimas potencias. The masculine counterpart is n-ésimo, with examples such as el n-ésimo elemento or los n-ésimos términos.

In mathematics and formal usage, n-ésima denotes the position or order of elements in sequences, series and functions. Options include la n-ésima potencia (the nth power), la n-ésima raíz (the nth root), and la n-ésima derivada (the nth derivative). The concept is also used to describe general terms in sequences, often written as a_n to indicate the nth term.

Nésimas thus functions as a grammatical and mathematical term indicating order and position in feminine contexts, parallel to n-ésimo for masculine contexts. Its use is primarily found in linguistic, mathematical, and technical writing within Spanish- and Portuguese-speaking contexts.