A group of four; a set of four things.

In mathematics, a quatern can refer to a quaternion, which is a number system that extends complex numbers.

संख्या प्रणाली जो जटिल संख्याओं का विस्तार करती है

English Usage: The concept of quatern is essential in three-dimensional computer graphics.

Hindi Usage: संख्या प्रणाली का विचार तीन-आयामी कंप्यूटर ग्राफिक्स में आवश्यक है।