1726, intransitive, "to vibrate, move backward and forward," as a pendulum does, a back-formation from oscillation, or else from Latin oscillatus, past participle of oscillare "to swing." Transitive sense of "cause to swing backward and forward" is by 1766. From 1917 in electronics, "cause oscillation in an electric current." Related: Oscillated; oscillating.
"generate or produce anew," 1550s, a back-formation from regeneration or else from Latin regeneratus, past participle of regenerare "bring forth again" (see regeneration). Originally theological, "cause to be born again, cause to become a Christian;" of body parts from 1590s. Related: Regenerated; regenerating; regenerable. Replaced earlier regeneren (c. 1400), from Old French regenerer.
"act of obliterating or effacing, a blotting out or wearing out, fact of being obliterated, extinction," 1650s, from Late Latin obliterationem (nominative obliteratio), noun of action from past-participle stem of obliterare "cause to disappear, blot out (a writing)," figuratively "cause to be forgotten, blot out a remembrance" (see obliterate).