nitro

1. (uncountable, chemistry) The univalent NO₂ functional group.

2. (uncountable, informal) Nitroglycerin, especially as medication.

3. (countable, informal) A beer that is nitrogenated to give it a more creamy head.

4. (uncountable, informal) Nitromethane.

5. (uncountable, informal) Nitrogen, especially as liquid nitrogen.Examples: "8 April 2018 Chomp Squad, "You Can Handel It" Blaze, set the blasters to liquid nitro! We're gonna freeze this lava before it flows any further."

6. (uncountable, informal) Nitrous oxide; the system that adds nitrous oxide to a car engine; by extension, a boost mechanic to speed up cars in a video game.Examples: "You need to find the smartest routes and optimize the nitro boost to win."; "Reaching down to his control panel , he pushed a big red button marked “nitro” . When the nitro mixed with the gasoline in the engine of Vane's monstrous machine, a giant fireball shot out from behind, launching the machine forward and almost knocking Vane right out of his seat."