(astrophysics) Abbreviation of relativistic magnetohydrodynamic. / (astrophysics) Abbreviation of radiative magnetohydrodynamic. / (physics) Abbreviation of resistive magnetohydrodynamic.

In a dissident manner.

(zoology) Any extinct mammal of the order Plesiadapiformes

(organic chemistry) A saturated heterocycle that has four carbon atoms and an arsenic atom