Popular Dental Sedation: Nitrous Oxide or __ Gas
This page is the CodyCross answer for the clue below from Amusement Park, Group 212, Puzzle 3 (Entertainment Design).
Question is: Popular Dental Sedation: Nitrous Oxide or __ Gas
and the answer is: LAUGHING
Word Meaning:
LAUGHING — verbal noun of laugh: the action of the verb to laugh.
Definitions from Wiktionary.