rhythm-, rhythmo- +

(Greek: regularly recurring motion; measured motion)

fetal rhythm
The rhythm of heart sounds which resembles that in the fetus in that both sounds are similar in character and intensity.
nodal rhythm
A heart rhythm produced when a pacemaker has been inserted in the atrioventricular node.
plagiarhythm (s) (noun), plagiarhythms (pl)
Stealing music and/or lyrics by downloading them from the internet and incorporating them into new pieces of music: Jack didn’t realize that he was committing plagiarhythm when he told his teacher that the composition was his own; although, in fact, he had put parts of melodies together from other songs he had found on the World Wide Web.
psychorhythmia, psychorrhythmia
An involuntary repetition of formerly voluntary activities.
rhythm
1. A movement or process conforming to a regular or periodic pattern often detectable by some corresponding indication; such as, a sound or beat, temperature, or electrical variation, etc.
2. Pertaining to a method of contraception making use of the alternation of periods of fertility with infertility in the menstrual cycle.
3. The arrangement of spoken words alternating stressed and unstressed elements.
4. An interval during which a recurring sequence of events occurs.
5. A measured movement; the recurrence of an action or function at regular intervals. 6. Movement or variation characterized by the regular recurrence or alternation of different quantities or conditions.
rhythmeur
A device for making rhythmic interruptions of the current in an x-ray machine.
rhythmic
1. With a regularly recurring pattern or beat.
2. Relating to, or having rhythm; recurring with measured regularity.
rhythmical
Characterized by rhythm.
rhythmicity
1. The state of being rhythmical.
2. Automaticity or the capacity of a cell to initiate an impulse; such as, depolarization, without an external stimulus.
rhythmometer
An instrument for marking time in musical movements.
rhythmopoeia, rhymopoeia
The creation of rhythmic music.
rhythmotherapy
Dance therapy or a method of psychological treatment in which movement and dance are used to express and deal with feelings and experiences, both positive and negative.
tachyarrhythmia
A medical condition in which the hearbeat is fast and irregular.
tachycardia, tachycardiac, tachycardic, tachyrhythmia
An excessively rapid heartbeat, typically regarded as a heart rate exceeding 100 beats per minute in a resting adult.
tachydysrhythmia
An abnormal heart rhythm with a rate greater than 100 beats per minute in an adult; the term tachyarrhythmia is usually used instead.