"a lagging of one of two related phenomenon behind the other" [Century Dictionary], 1881, from Greek hysteresis "a coming short, a deficiency," from hysteros "later, second, after," from PIE *ud-tero-, from root *ud- "up, out" (see out (adv.)). Earlier as a term in rhetoric.
hypsography
hypsometry
Hyrcania
hyssop
hysterectomy
hysteresis
hysteria
hysteric
hysterical
hysterics
hysteron-proteron