antiphase

adjective
an·ti·phase | \ ¦an-ˌtī-¦fāz , ¦an-tē- \

Definition of antiphase 

physics

: having phases or cycles in direct opposition The antiphase relationships seen between perturbations in potential temperature and pressure, and quadrature (quarter-wavelength) relationships between potential temperature and vertical velocity perturbations, are both characteristics of solitary waves. —Steven E Koch et al., Monthly Weather Review, April 2008 … says it has been working since 1983 on flat panels to generate antiphase sound, which cancels unwanted noise. —Barry Fox, New Scientist, 25 Jan. 1997

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Other words from antiphase

antiphase noun
Two of these cylinders are the left and right anterior (apical) lobes of the lungs, driven by the forces on the forelegs. These two cylinders work in antiphase to each other, both at the stride frequency. —R. McNeill Alexander, Science, 8 Oct. 1993

First Known Use of antiphase

1958, in the meaning defined above

History and Etymology for antiphase

anti- entry 1 + phase entry 2

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The first known use of antiphase was in 1958

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