Orthonormal tetrad/frame name question

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SUMMARY

The terms "orthonormal tetrad" and "orthonormal frame" refer to the same mathematical concept, although the use of "tetrad" is technically limited to four-dimensional contexts. The prefix "tetr-" originates from Greek, meaning "four," which clarifies its specific application. This distinction is crucial for accurate communication in fields such as relativity and field theory.

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quasar_4
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This is just a "lingo" question, and maybe it belongs in a relativity/field theory thread instead of here, but does anyone know: is the term "orthonormal tetrad" referring to the same object as an "orthonormal frame"?

The tetrad bit is throwing me off, but I'm pretty sure they're the same. Anyone know?
 
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Yes, although it's technically incorrect to apply the term "tetrad" in any situation other than with four dimensions, 'tetr-' being the Greek root for "four."
 

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