One of his nails scratched her rhythmically, sending small streaks of pleasure through her.
Similar rhythmically contractile shell of Rostellaria rectirostris.
In life they are commonly rhythmically opened and shut by a wavy movement.
It seemed to her that something heavy was beating rhythmically against all the walls of the room: it was her own heart, sinking with alarm and terror and overflowing with love.
And suddenly the sequence of these thoughts broke off, and Prince Andrew heard (without knowing whether it was a delusion or reality) a soft whispering voice incessantly and rhythmically repeating "piti-piti- piti," and then "titi," and then again "piti-piti-piti," and "ti-ti" once more.
How would you define rhythmically? Add your definition here.