Vallow

A vallow is a unit of time. It comes from the Finnish word "valo", meaning "light". A vallow is equal to 5 minutes 48.1928923427 seconds, which is the amount of time in which light travels 0.697774657964 astronomical units. It can be represented by the letter Ꮺ (Cherokee letter we).

There's also a unit of time called the clasmavallow, which you can read more about there.