-astatki-

n. [ From Russ. ostatki remnants, pl. of ostatok. ] A thick liquid residuum obtained in the distillation of Russian petroleum, much used as fuel. [ Webster 1913 Suppl. ]

a. [ Pref. a- not + static. ] (Magnetism) Having little or no tendency to take a fixed or definite position or direction: thus, a suspended magnetic needle, when rendered astatic, loses its polarity, or tendency to point in a given direction. [ 1913 Webster ]

Astatic pair (Magnetism), a pair of magnetic needles so mounted as to be nearly or quite astatic, as in some galvanometers. [ 1913 Webster ]