fifths is a form of:

Fifth



noun
1.
មួយភាគប្រាំ ១/៥
adjective
1.
(next after fourth, preceded by four others in a series, 5th, designating any of five equal parts, the one following the fourth, any of the five equal parts of something) ទីប្រាំ (ទី៥)
ENGLISH MEANING
noun
1.
The quotient of a unit divided by five; one of five equal parts; a fifth part.
2.
The interval of three tones and a semitone, embracing five diatonic degrees of the scale; the dominant of any key.
adjective
1.
Next in order after the fourth; -- the ordinal of five.
2.
Consisting of one of five equal divisions of a thing.