Force Created by Pressure Difference
This page is the CodyCross answer for the clue below from Trip to Spain, Group 853, Puzzle 3 (Decorative Hair Comb).
Question is: Force Created by Pressure Difference
and the answer is: SUCTION
Word Meaning:
SUCTION — (physics) A force which pushes matter from one space into another because the pressure inside the second space is lower than the pressure in the first.
Definitions from Wiktionary.