ticktock

from WordNet (r) 3.0 (2006)
ticktock
    n 1: steady recurrent ticking sound as made by a clock [syn:
         {ticktock}, {tocktact}, {tictac}]
    v 1: make a sound like a clock or a timer; "the clocks were
         ticking"; "the grandfather clock beat midnight" [syn:
         {tick}, {ticktock}, {ticktack}, {beat}]
    

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