homopolar

adjective

ho·​mo·​po·​lar ˌhō-mə-ˈpō-lər 

ˌhä-

1

of a motor or generator : using or producing direct current without the use of commutators

2

: of or relating to a union of atoms of like polarity : nonionic

Word History

First Known Use

1896, in the meaning defined at sense 1