Gas Valve for Releasing Pressure in an Engine
This page is the CodyCross answer for the clue below from Babies and Toddlers, Group 1676, Puzzle 3 (Adventurous Spirit).
Question is: Gas Valve for Releasing Pressure in an Engine
and the answer is: PISTON
Word Meaning:
PISTON — (mechanics) A solid disk or cylinder that fits inside a hollow cylinder, and moves under pressure (as in an engine) or displaces fluid (as in a pump)
Definitions from Wiktionary.