Last seen in:
- L.A. Times Daily - Nov 13 2021
- New York Times - Sep 13 2020
- New York Times - Jun 17 2020
- New York Times - Sep 1 2019
- USA Today - Sep 3 2015
- USA Today - Sep 2 2015
- Canadiana - Feb 16 2015
- Premier Sunday - King Feature Syndicate - Dec 21 2014
- New York Times - May 10 2014
- L.A. Times Daily - Oct 18 2013
Related Clues:
- Essential acid, familiarly
- __ oxide: laughing gas
- Marbled, as meat
- ___ oxide (laughing gas)
- __ acid: explosive compound
- Vinegar-based, e.g.
- __ acid (protein part)
- Like some acids
- Part of PABA
- Like the acid in limes
- B-complex's --- acid
- Kind of acid found in spinach
- Of an air element
- Somewhat astringent, as wine
- Laughing gas, for short