NITROUS OXIDE
Meaning of NITROUS OXIDE in English
ni ‧ trous ox ‧ ide /ˌnaɪtrəs ˈɒksaɪd $ -ˈɑːk-/ BrE AmE noun [uncountable]
a gas used by ↑ dentist s to reduce pain SYN laughing gas
Longman Dictionary of Contemporary English.
Longman - Словарь современного английского языка.
2012