nonterminating

adjective

non·​ter·​mi·​nat·​ing ˌnän-ˈtər-mə-ˌnā-tiŋ 

: not terminating or ending

especially : being a decimal for which there is no place to the right of the decimal point such that all places farther to the right contain the entry 0

¹/₃ gives the nonterminating decimal .33333 …

Word History

First Known Use

1895, in the meaning defined above