須臾

Etymology

 * “48 minutes”

Noun

 * 1)  an instant
 * 2)  A unit of time consisting of one-thirtieth of a day (approximately 48 minutes).
 * 1)  A unit of time consisting of one-thirtieth of a day (approximately 48 minutes).

Etymology 1
Appears to be a shift in reading from suyu below, adopting the relatively newer kan'on reading of shu for the first character.

Noun

 * 1) a short amount of time, a moment, an instant
 * 2)  a very small number, 10-15

Etymology 2
Probably from. The goon reading, so likely the initial borrowing.

Ultimately derived as a meaning-based translation of, applied to the earlier phonetically transcribed term.

This reading appears to be less common than shuyu above.

Noun

 * 1) a short amount of time, a moment, an instant
 * 2)  a very small number, 10-15