Swinging Clock Invented by Christiaan Huygens
This page is the CodyCross answer for the clue below from Small World, Group 687, Puzzle 2 (Goosebumps).
Question is: Swinging Clock Invented by Christiaan Huygens
and the answer is: PENDULUM
Word Meaning:
PENDULUM — (clocks, mechanics) A body suspended from a fixed support so that it swings freely back and forth under the influence of gravity, commonly used to regulate various devices such as clocks.
Definitions from Wiktionary.