A Paper Serviette to Keep Your Hands Clean
This page is the CodyCross answer for the clue below from Physics, Group 1881, Puzzle 3 (Geometrical Optics).
Question is: A Paper Serviette to Keep Your Hands Clean
and the answer is: NAPKIN
Word Meaning:
NAPKIN — A serviette; a (usually rectangular) piece of cloth or paper used at the table for wiping the mouth and hands for cleanliness while eating.
Definitions from Wiktionary.