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tetrahedral

A 4-sided shape commonly found within the proper bounds of Euclidian geometry.
Hey, that affine transformation with the tetrahedral sure was exceptionally difficult, good sir.
tetrahedral by Mr. Slartybartfest November 29, 2007

Tetrahedral number 

The {n}th tetrahedral number is the sum of the first n Triangular numbers. Triangular numbers are the sum of the first n integers (1, 3, 6, 10, 15, etc.), and taking the sum of the triangular numbers results in the tetrahedral numbers (1, 4, 10, 20, 35, etc.)
The fifth tetrahedral number is the sum of the first five triangular numbers. The first five triangular numbers are 1, 3=1+2, 6=1+2+3, 10=1+2+3+4, and 15=1+2+3+4+5, so the sum of these numbers is 1+3+6+10+15= 35.

love tetrahedron 

Similar to a love triangle, a love tetrahedron is a messy situation where four individual are involved in lies, machinations, and deceipt as a result of love or lust - ultimately ruining friendships and/or changing living arrangements.
1. Paul, Paul's roommate, Bob, Bob's girlfriend Elizabeth, and Elizabeth's best-friend, Sheryl where involved in a love tetrahedron. Bob was asked to move out of Paul's pad.
love tetrahedron by Chaz The Gaz September 1, 2008

sodium tetrahydroaluminate 

This boss chemical is the secret that will rock your world. Remember the Hindenburg? You don't want that for your hydrogen powered car. This chemical locks the hydrogen up for safe keeping, until it is released with heat to become available in your engine.
Friend: Dude, why did you snag that hydro-car at the dealio? You are going to be a freakin' 4th-of-July display when that sucker blows. Hydrogen burns like a mutha you sucka!

Buyer: Not to worry my future fearing friend, the hydroms are locked up in sodium tetrahydroaluminate.

tetrahydracannibonol 

The ingredient in marijuana that puts a person in the state of being high. It's more commonly referred to and abbreviated as THC.
Dave: My drug test came back positive for tetrahydracannibonol.
Alex: That's because you smoke too much weed.
tetrahydracannibonol by AC Money November 28, 2007

tetrahedron

A regular polyhedron consisting of four triangular sides
The die that the DM was rolling was shaped like a tetrahedron
tetrahedron by 2^63-1 June 2, 2015
More from Urban Dictionary

countrypolitan 

Term used to describe someone who is a mix of both rural (country) and urban (metropolitan) lifestyles/upbringings. He/she is typically equally comfortable in both settings and is able to seamlessly slip back and forth between the two, appreciating the characteristics of each.
That ol' gal of mine drives the 12 lane freeway during the week and a John Deere on the weekends. She likes opra and the Grand Ol' Opry. I love them countrypolitan women.
countrypolitan by MOChick November 7, 2006
Word of the Day on November 1, 2026

Witch Bath 

A bath consisting of a variety of slats, oils, soaps or any other added ingredients such as fruits, milks, herbs or any other spices for health or beautifying benifits.
She brought home alot of stuff and took it to the bathroom. She must be taking a witch bath.
Witch Bath by carnieboy30 October 26, 2020
Word of the Day on October 31, 2026

kinktober 

An excuse for people to write porn with different types of kinks throughout the month of October.

Smut Fanfiction
That chick doesn't write often but when she does, its for Kinktober.
kinktober by Kinkiest July 12, 2018
Word of the Day on October 30, 2026

proper lad 

a lad that is such a lad that he is a proper lad
person1:did you see bob
person2: ya he was a proper lad
Word of the Day on October 29, 2026
The number of years you are still sexually active
While our lifespan is the number of years we will live, our healthspan is the number of healthy years we will have and our sexspan is is the number of years we will continue to be healthy enough to continue having an active sex life.
sexspan by Dr Kat April 21, 2022
Word of the Day on October 28, 2026
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