Answer: nitrous

AnswerCrossword Clue
NITROUS

.. oxide (laughing gas)

NITROUS.. oxide: laughing gas
NITROUS

Dentistry number, familiarly

NITROUS

Containing a certain salt.

NITROUS
Of a chemical compound
NITROUS
..... oxide
NITROUSKind of acid
NITROUSLaughing gas, familiarly