noun, noun which may take the genitive case particle 'no'
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.
English ordinal numbers are 'first,' 'second,' 'third,' and so on.
Ordinal numerals are used to express order.
From 序 (order) + 数 (number). A straightforward compound with no unusual historical derivation.