noun
dotted note
A musical note with a dot after it, increasing its duration by half. Used in music notation contexts.
付点音符の長さは、元の音符の1.5倍です。
The length of a dotted note is 1.5 times the original note.
Compound of 付点 (futen, 'dot') + 音符 (onpu, 'musical note'). The exact historical derivation is uncertain, but the term is a straightforward description of the notation.