Ohio State (11-2, 2-1) was outscored 8-1 in the second half and lost 15-5 in a Big Ten game at Maryland (14-0, 3-0).
Rainey Hodgson led the Buckeyes with two goals.
Taylor Cummings had five goals, Megan Whittle three, and three other players added two apiece for the Terrapins, which outshot the Buckeyes 42-14.