Hydrogen oxide 

A scientific word for water. H2O. Not to be confused with deuterium oxide, which is heavy water (D2O).

A: I filled these ballons with hydrogen oxide.
B:What's that?
A:It's water.

Hydrogen oxide by HawaiianPunch1 July 31, 2010

hydrogen hydroxide 

The term "hydrogen hydroxide" means a hydrogen ion (H+) bonded to a hydroxide ion (OH-). when you put those together, you get H-O-H, which is of course H2O, which is water!

Dude, I need some hydrogen hydroxide!

What?

Hydrogen hydroxide. . . . You know? A hydrogen ion and a hydroxide ion bonding? H2O? WATER?

OOOOOOOOOOOH.

hydrogen hydroxide by Ubiquitousian April 15, 2011

hydrogen atom 

an atom of hydrogen, duh.

Urban Dictionary user: I wonder what is hydrogen atom?
Urban Dictionary: Look them up separately, you dumbass!

hydrogen atom by 32121 July 27, 2016

hydrogen psychosis 

Hydrogen psychosis is a fictional ailment acquired by SCUBA divers in the Wes Anderson-directed movie The Life Aquatic with Steve Zissou. It is apparently based on the very real health risk nitrogen narcosis, caused by the effects of relatively fast, relatively great changes in external pressure on the human body.

Man, you got hydrogen psychosis!

hydrogen psychosis by Furieh April 25, 2006

Hydrogen'd 

Hydrogen, as we all know, has Atomic Number 1 and can be considered as the most basic element known. Hydrogen'd originated from Soldier-Front which meant "one person team." This happens when a situation of 3 or more people goes against only 1 person on the other team and at the end, the lone person wins the round. It basically means 1 man team.

Their sniper hydrogen'd our team for three consecutive rounds.

Hydrogen'd by Mark Espiritu February 1, 2008

Hydrogen Bond 

HYDROGEN BOND!!!!! I like to cha cha don't judge me.

Hydrogen BOND. Ehehehehehehehhehehehe.

Hydrogen Bond by Yusef and Sebastian May 15, 2022

hydrogen bomb 

The most powerful bomb. Opposite of atom bomb, but similar in power. While the Atom Bomb uses nuclear fission(a mass of material is assembled into a supercritical mass((a mass enough to start a nuclear chain reaction)). neutrons are then injected which causes the reaction and later the explosion).
hydrogen bombs instead use nuclear fusion,(joining of atoms to make heavier atoms.) then adding tritium, deuterium, or lithium deuteride, along with xrays and gamma rays from fission, making them thousands of times more powerful than atom bombs.yea.

(some of this info from www.wikipedia.org)

If you get hit by one of those you are screwed

Out of the 26,0000 nuclear bombs, the Russian Federation and the U.S own 96% of them. A lot of those are hydrogen bombs

hydrogen bomb by Alex14 June 21, 2006