Also called: Angle of time · Musical angle · Angle of rhythm · Time angle · Lower thumb angle

Where on the hand: On the radial edge of the hand at the base of the thumb, low down where the thumb's base meets the wrist — the lower of the two bumps found along that edge.

What it looks like: A visible angular bump breaking the outline of the hand's thumb edge, seen best by holding the hand flat and looking at its silhouette from the side. A well-marked angle gives a definite corner; a poorly marked one gives a smooth curve.

Read as an inborn sense of timing and rhythm. Its owners are said to keep time without counting, to come in on the beat, and to have a bodily rather than intellectual relation to rhythm. It is looked for in musicians — especially percussionists — dancers, and athletes in sports where timing decides everything.