From The Collaborative International Dictionary of English v.0.48 :
Pulseless \Pulse"less\, a.
Having no pulsation; lifeless.
[1913 Webster]
From WordNet (r) 3.0 (2006) :
pulseless
adj 1: appearing dead; not breathing or having no perceptible
pulse; "an inanimate body"; "pulseless and dead" [syn:
breathless, inanimate, pulseless]