Other definitions for tetra (2 of 2)
Origin of tetra-
WORDS THAT USE TETRA-
What does tetra- mean?
Tetra- ultimately comes from the Greek téttares, meaning “four.” The name of the classic video game Tetris is based in part on this Greek root. Find out the rest of the story of how Tetris got its name here.
What are variants of tetra-?
Examples of tetra-
One example of a word you may have encountered that features tetra- is tetragon, “a polygon having four angles or sides,” such as a square or rectangle. A tetragon is also known as a quadrangle or quadrilateral.
The first part of the word, tetra-, means “four,” as we know. The -gon portion of the word may also look familiar: it is a combining form meaning “angled” or “angular,” from the Greek gōnía. Tetragon literally translates to “four-angled.”
The word tetragon comes from the Greek tetrágōnon, which uses the equivalent form of tetra- in the language.
Another geometric shape using the combining form tetra- is tetrahedron, a triangular pyramid; it’s so named because the shape is formed using four (tetra-) faces (-hedron).
You may have also heard of a tetralogy, which refers to a series of four related plays, novels, films, video games, or other media. It’s like a trilogy—plus one. Shakespeare’s so-called Henriad is an example of a tetralogy. It consists of four connected history plays: Richard II, Henry IV, Part 1, Henry IV, Part 2, and Henry V.
What are some words that use the combining form tetra-?
Many of the following words use the equivalent form of tetra- in Greek.
What are some other forms that tetra- may be commonly confused with?
How to use tetra in a sentence
From a purely environmental standpoint, the statistics in favor of Tetra Pak packaging are astounding.
An ambitious Swiss packaging company, Tetra Pak, presents another alternative to Bag-in-Box.
I had my first taste of Tetra Pak wine from a neon green package labeled “Bandit” a couple of years ago.
In addition, a one-liter Tetra Pak weighs less than a pound.
Eva and her husband Hans Kristian Rausing, heir to the $10bn Tetra Pak fortune, were both friends of Prince Charles.Body of Eva Rausing, Friend of Prince Charles, May Have Lain Undiscovered For A Week|Tom Sykes|July 12, 2012|DAILY BEAST
A small pink flower of the class Tetra dynamia covered the prairie.
In the case of tetra-substituted compounds, thirty isomers are possible when all the groups are different.
Sleep may be secured by lowering the blood pressure with half-grain doses of erythrol-tetra-nitrate.
Fluorescein is readily nitrated, yielding a di- or tetra-nitro compound according to conditions.
This mixture is treated with potassium chlorate and hydrochloric acid, whereby it is converted into tetra-chlorinated products.