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