from
The Collaborative International Dictionary of English v.0.48
Persistence \Per*sist"ence\, Persistency \Per*sist"en*cy\, n.
[See {Persistent}.]
1. The quality or state of being persistent; staying or
continuing quality; hence, in an unfavorable sense,
doggedness; obstinacy.
[1913 Webster]
2. The continuance of an effect after the cause which first
gave rise to it is removed; as:
(a) (Physics) The persistence of motion.
(b) (Physiol.) Visual persistence, or persistence of the
visual impression; auditory persistence, etc.
[1913 Webster]