A.quivering motion, “πυγῆς” Alciphr.1.39; esp. pulsation, throbbing (on π. and σφυγμός cf. Gal.8.716), “φλεβῶν” Hp.Acut.37; “ὑποχονδρίου” Id.Epid.1.26. “β́; ὑπὸ κροτάφοισι” Nic.Al.27, cf. Th.744: abs., palpitation of the heart, a disease, Arist.Resp.479b21; twitching, Gal.7.588.
2. of natural phenomena, vibration, rapid motion, D.S. 3.51, Nonn.D.2.193, al.; of meteors, Plu.Lys.12 codd.; impetus of a projectile, Ath.Mech.37.8.
3. in Epicur., internal vibration of bodies, Ep. I p.8 U., cf. Id. ap. Placit.1.12.5 (v.l. ἀποπαλμός).