Alternative spelling of wavenumber

A list whose items are numbered, with various styles including Arabic numerals and Roman numerals.

(grammar) A word that expresses a countable number of times; an adverbial numeral.

(grammar) A word that answers "how many times each?" or "how many at a time?"

plural of number sign

plural of octane number

plural of vanity number

(idiomatic) A person who holds a position in an organization that corresponds to that held by another person in another organization; a counterpart

plural of whole number

The number of protons in an atom.