RhymeZone: nitro definitions

Definitions of nitro:

noun: (uncountable, chemistry) the univalent NO₂ functional group.
noun: (uncountable, informal) nitroglycerin, especially as medication.
noun: (countable, informal) A beer that is nitrogenated to give it a more creamy head.
noun: (uncountable, informal) nitromethane.
noun: (uncountable, informal) nitrogen, especially as liquid nitrogen.
adjective: (chemistry) Containing the nitro group.
noun: A city in West Virginia

(Definitions from Wiktionary)