Semiquaver
/ˈsemikweɪvər/
Definition 1 of 1
Pro Tip 1/3Musical Speed
Semiquaver indicates a very quick note in music, played for a short duration. 
The pianist's fingers danced over the keys in a series of semiquavers.
Pro Tip 2/3Music Notation
In sheet music, semiquavers are represented by notes with two flags or beams. 
She struggled to read the semiquavers in the score.
Pro Tip 3/3Counting Beats
To count semiquavers, musicians often subdivide beats into four equal parts. 
The drummer counted '1-e-&-a 2-e-&-a' to keep time with the semiquavers.