Search Result for "tickler coil":
Wordnet 3.0

NOUN (1)

1. a small coil in series with the anode of a vacuum tube and coupled to the grid to provide feedback; 



WordNet (r) 3.0 (2006):

tickler coil
    n 1: a small coil in series with the anode of a vacuum tube and
         coupled to the grid to provide feedback