IPA: /rɪˈðmɪsɪti/
KK: /rɪˈðmɪsɪti/
The quality or state of having a regular pattern or beat.
The rhythmicity of the music made everyone want to dance.
Rhythmicity is formed from "rhythm" (from Greek "rhythmos", meaning measured flow or movement) and the suffix "-icity" (from Latin "-icitas", meaning quality or state of). The word refers to the quality or state of having rhythm.
Think of 'rhythm' as a measured flow, and '-icity' as indicating a quality. This helps you remember that 'rhythmicity' means the quality of having rhythm.