irrotational

adjective ir·ro·ta·tion·al \ ˌir-(r)ō-ˈtā-shnəl , -shə-nᵊl \

Definition of irrotational

1 : not rotating or involving rotation

2 : free of vortices

irrotational flow

First Known Use of irrotational

1875

in the meaning defined at sense 1

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