序じょ数すう

noun, noun which may take the genitive case particle 'no'

ordinal number

Refers to numbers indicating order or position (first, second, third, etc.), as opposed to cardinal numbers (基数). Used in mathematics, grammar, and everyday contexts.

• 英えい語ごの序じょ数すうは「first」「second」「third」などです。

  English ordinal numbers are 'first,' 'second,' 'third,' and so on.

• 序じょ数すう詞しは順じゅん序じょを表あらわすときに使つかいます。

  Ordinal numerals are used to express order.