flip-flop

Noun	1.	flip-flop - a decision to reverse an earlier decision Synonyms: change of mind, turnabout, turnaround, reversal
	2.	flip-flop - a backless sandal held to the foot by a thong between the big toe and the second toe
	3.	flip-flop - an electronic circuit that can assume either of two stable states
	4.	flip-flop - a backward somersault
Verb	1.	flip-flop - reverse (a direction, attitude, or course of action) Synonyms: interchange, alternate, tack, switch, flip

(hardware)

flip-flop - A digital logic circuit that can be in one of two states which it switches (or "toggles") between under control of its inputs. It can thus be considered as a one bit memory. Three types of flip-flop are common: the SR flip-flop, the JK flip-flop and the D-type flip-flop (or latch). Early literature refers to the "Eccles-Jordan circuit" and the "Eccles-Jordan binary counter", using two vacuum tubes as the active (amplifying) elements for each bit of information storage. Later implementations using bipolar transistors could operate at up to 20 million state transitions per second as early as 1963.

alternate, change by reversal, change of mind, flip, interchange, reversal, reverse, switch, tack, turn, turnabout, turnaround