Wordnet 3.0
NOUN (1)
1.
an arrangement of coils used in sensitive electrical instruments;
the coils are arranged to give zero resultant external magnetic field when a current passes through them and to have zero electromotive force induced in them by an external magnetic field;
WordNet (r) 3.0 (2006):
astatic coils
n 1: an arrangement of coils used in sensitive electrical
instruments; the coils are arranged to give zero resultant
external magnetic field when a current passes through them
and to have zero electromotive force induced in them by an
external magnetic field