Respondance 

Corresponding with the sole purpose of responding.

Respondance is anything as light as a simple RSVP, to honoring a request to "throw a brick through my window, next time you think of it."

Respondance by UberQ April 13, 2015

Resonance Cascade 

A fictional phenomenom where waves of energy combine in a continual loop (cascading). In essence, the energy multiplies out of control. See Resonance Reversal.

I never thought I'd see a Resonance Cascade, let alone create one!

Resonance Cascade by thirdwheel1985 May 9, 2009

Nuclear magnetic resonance spectroscopy (NMR) 

Nuclear magnetic resonance spectroscopy, most commonly known as NMR spectroscopy or magnetic resonance spectroscopy (MRS), is a spectroscopic technique to observe local magnetic fields around atomic nuclei. The sample is placed in a magnetic field and the NMR signal is produced by excitation of the nuclei sample with radio waves into nuclear magnetic resonance, which is detected with sensitive radio receivers. The intramolecular magnetic field around an atom in a molecule changes the resonance frequency, thus giving access to details of the electronic structure of a molecule and its individual functional groups. As the fields are unique or highly characteristic to individual compounds, in modern organic chemistry practice, NMR spectroscopy is the definitive method to identify monomolecular organic compounds.

Person 1: Do you think our laboratory needs an NMR-spectrometer?

Person 2: I've heard they're unbelievably expensive, but Nuclear magnetic resonance spectroscopy (NMR) is an essential analytical procedure for sure .

Nuclear magnetic resonance spectroscopy (NMR) by chemking May 28, 2020

Resonance 

The song that makes you forget that the world is shitty for three minutes.

Sam: I hate my life. I'm gonna listen to Resonance.
John: Don't leave me out! I want to forget that life sucks too!

Resonance by NotPieGuy January 26, 2021

Resonance Moment 

When you are doing something to try and look cool and end up screwing everything up or losing.

Abbreviation: RM

While playing Call of Duty: Modern Warfare 2

Player 1: "How could you lose?"
Player 2: "I was trying to make Kill cam look cool."
Player 1: "You had a Resonance Moment."

Resonance Moment by CrazyErich April 7, 2010

resonance 

1. This happens when two or more people match their soul wave lengths.

2. A song wrote by T.M. Revoultion

1. we looked over the cliff and just as the sun set we had a soul resonance

resonance by XxDeathTheKiddxX April 3, 2010

cyclotron resonance 

plasma in a magnetic field is heated through the resonance effect when the vibration frequency of an oscillating electromagnetic field matches the gyro-frequency of the charged particles in the plasma. This effect is known as Ion Cyclotron Resonance Heating, and enables the generation of superheated plasma over 100 million degrees celcius of temperature.

this definition is pretty much ruining the title "urban" dictionary. but every dictionary should have something like cyclotron resonance.

cyclotron resonance by rockwell13 September 13, 2006