A Virga

1. (music) A type of note used in plainsong notation, having a tail and representing a single tone.
2. (meteorology, countable) A streak of rain or snow that is dissipated in falling and does not reach the ground, commonly appearing descending from a cloud layer.
3. (measurement, countable) A unit of length: a rod, pole or perch (5½ yards); or a unit of area: a square rod, pole or perch.

(musical note): virgula