system clock

1. 1.

   a time-of-day clock in a computer system

   Broaderclock
2. 2.

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

   Broaderelectronic device

Questions about system clock

What does system clock mean?

system clock means "a time-of-day clock in a computer system". That is the primary sense; the word has 2 in total, listed in full on this page.

Is system clock a common word?

system clock is banded "Uncommon" — turns up in careful writing rather than conversation. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.