The Water Tank on a Toilet
This page is the CodyCross answer for the clue below from Physics, Group 1887, Puzzle 3 (Protons and Electrons).
Question is: The Water Tank on a Toilet
and the answer is: CISTERN
Word Meaning:
CISTERN — A reservoir or tank for holding water, especially for catching and holding rainwater for later use.
Definitions from Wiktionary.