proper acceleration
Word Rarity
Rare
Frequency: Zipf frequency 3.69 in modern English
26
Scrabble Score
18
Letters
6
Syllables
10
Unique Chars
Meaning
noun
The acceleration felt by an object, as opposed to the coordinate acceleration. For example the acceleration of an object at the surface of the Earth is 9.81 m/s² upwards, but has no coordinate acceleration. The proper acceleration of an object is Lorentz invariant.