ticking• Once the minerals in a rock are formed, any radioactiveelements in those minerals keep ticking away.• Reportrepeated two and a halfsecondticking sounds from plane.• Upon its arrival home on March 26, H-4 was still ticking.• The only sound came from the ticking of a clock.• In the silence she heard the ticking of the carriage clock.• Repetitivestimuli are relegated to backgroundnoise and, like the ticking of that clock, are not heard until they stop.• In the brooding silences the ticking of the clock seemed to become louder.• That was where the ticking was coming from, thought Endill.
Originticking
(1600-1700)tick“rough cloth”((15-20 centuries)), probably from Middle Dutchtike