Dictionary of Space Concepts

Source:

https://en.wikipedia.org/wiki/CubeSat#/media/File:Ncube2.jpg

Short definition: 

A cube satellite is a standardized miniature satellite, widely used for simpler tasks that require orbital position, as well as for engineering project and research. Due to standardized dimensions and small size, cube sats, as they are also known, are much more affordable than regular big satellites

Detailed Definition:

CubeSats is a class of miniaturized satellite that weight less than 2kg and are usually shaped as a 10cm cube (10cm is referred to as 1U). They are put into orbit by ISS or launched as secondary payload. As of end of 2021, more than 1600 of them have been launched. Cube sats are usually used for experiments that involve hardware which can be miniaturized, like earth observation, amateur radio or research projects. They are also used to demonstrate spacecraft technologies that are either designed for a small satellites or are too expensive or uncertain to safely involve them into a regular size satellite.

Etymology:

Cube – Greek - (kybos)  a six-sided die

Sample Sentence(s):

"CubeSats are employed to demonstrate spacecraft technologies."

"Like larger satellites, CubeSats often feature multiple computers handling different tasks in parallel including the attitude control."

Translations:

French: cube satellite

German: der Würfelsatellit

Swedish: kubformad satellit

Polish: satelita sześcianu

Links to videos/articles:

https://www.asc-csa.gc.ca/eng/satellites/cubesat/what-is-a-cubesat.asp