Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to astatic: astatic seizure
1. Unsteady; unstable.
2. Physics Having no particular directional characteristics.
1. not static; unstable
2. (General Physics) physics
a. having no tendency to assume any particular position or orientation
b. (of a galvanometer) having two mutually compensating magnets arranged so that the instrument is independent of the earth's magnetic field
[C19: from Greek astatos unsteady; see a-1, static]