ordinal number
From Longman Dictionary of Contemporary EnglishRelated topics: Numbersordinal numberˈor‧di‧nal ˌnumber (also ordinal) /ˈɔːdɪnəl $ ˈɔːrdənəl/ noun [countable] HMNone of the numbers such as first, second, third etc which show the order of things → cardinal numberOrigin ordinal number (1500-1600) Late Latin ordinalis, from Latin ordo; → ORDER1