Relating to or causing acceleration; having the effect of speeding something up.
From accelerate + -ory (forming adjectives meaning 'relating to' or 'serving to'). The root Latin accelerare means 'to hasten,' from ad- (to) + celer (swift).
Words ending in -ory are classic in formal and technical writing—'acceleratory' and 'accelerative' are near-synonyms, but -ory often appears in more established scientific terminology, which is why you'll see 'acceleratory motion' in physics textbooks!
Complete word intelligence in one call. Free tier — 50 lookups/day.