Search Result for "system clock":
Wordnet 3.0

NOUN (2)

1. a time-of-day clock in a computer system;

2. an electronic device in a computer that issues a steady high-frequency signal that synchronizes all the internal components; 



WordNet (r) 3.0 (2006):

system clock
    n 1: a time-of-day clock in a computer system
    2: an electronic device in a computer that issues a steady high-
       frequency signal that synchronizes all the internal
       components