a structure consisting of something wound in a continuous series of loops | a small coil in series with the anode of a vacuum tube and coupled to the grid to provide feedback |
reactor consisting of a spiral of insulated wire that introduces inductance into a circuit | |
tubing that is wound in a spiral | |
a contraceptive device placed inside a woman's womb | |
a transformer that supplies high voltage to spark plugs in a gasoline engine | |
a round shape formed by a series of concentric circles (as formed by leaves or flower petals) | |