ordinal

Short definition from Wiktionary

Adjective

1. 1
   Indicating position in a sequence.
2. 2
   Pertaining to a taxon at the rank of order.
3. 3
   Intercardinal.

Noun

1. 1
   An ordinal number such as first, second and third.
2. 2
   A book used in the ordination of Anglican ministers, or in certain Roman Catholic services
3. 3
   A unique serial number assigned to a satoshi based on its position in the blockchain.