tick

tick (http://definr.com/tick)

     n 1: a metallic tapping sound; "he counted the ticks of the
          clock" [syn: ticking]
     2: any of two families of small parasitic arachnids with barbed
        proboscis; feed on blood of warm-blooded animals
     3: a light mattress
     v 1: make a clicking or ticking sound; "The clock ticked away"
          [syn: click]
     2: make a sound like a clock or a timer; "the clocks were
        ticking"; "the grandfather clock beat midnight" [syn: ticktock,
         ticktack, beat]
     3: sew, as of mattresses; "tick a mattress" [syn: retick]