bifilar electromagnetic oscillograph

bifilar electromagnetic oscillograph

[bī′fi·lər i‚lek·trō·mag′ned·ik ä′sil·ə‚graf]
(electromagnetism)
A writing low-frequency light-beam oscillograph usually using a moving coil with a single U-shaped turn (bifilar type).
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.