Hollow Tube in Which a Piston Moves

This page is the CodyCross answer for the clue below from Popcorn Time, Group 391, Puzzle 5 (Leading Lady).

Question is: Hollow Tube in Which a Piston Moves

and the answer is: CYLINDER

Word Meaning:

CYLINDER — (geometry) A surface created by projecting a closed two-dimensional curve along an axis intersecting the plane of the curve.

Definitions from Wiktionary.

Hollow Tube In Which A Piston Moves - Popcorn Time CodyCross Answers | CodyCross Solutions