- accelerate (v.)
- 1520s, from Latin acceleratus, past participle of accelerare "to hasten, quicken," from ad- "to" (see ad-) + celerare "hasten," from celer "swift" (see celerity). Related: Accelerated; accelerating.
- acceleratory
- "= accelerative", Early 18th cent. From accelerate + -ory. Compare earlier accelerating, accelerative.
- betatron
- "An apparatus for accelerating electrons in a circular path by magnetic induction", 1940s: from beta + -tron.