Nitrous Oxide Administered by Dentists: __ Gas
This page is the CodyCross answer for the clue below from Pet Shop, Group 351, Puzzle 2 (Cat Grasses).
Question is: Nitrous Oxide Administered by Dentists: __ Gas
and the answer is: LAUGHING
Word Meaning:
LAUGHING — verbal noun of laugh: the action of the verb to laugh.
Definitions from Wiktionary.