RAPIDITY
celerity, quickness, rapidity, rapidness, speediness
(noun) a rate that is rapid
Source: WordNet® 3.1
Etymology
Noun
rapidity (countable and uncountable, plural rapidities)
speed, swiftness; the condition of being rapid
(physics) A measure of velocity relative to the speed of light
(physics) A measure of the velocity of a particle in a beam relative to the beam's axis
Source: Wiktionary
Ra*pid"i*ty, n. Etym: [L. rapiditas: cf. F. rapidité.]
Definition: The quality or state of being rapid; swiftness; celerity; velocity; as, the rapidity of growth or improvement.
Syn.
– -- Rapidness; haste; speed; celerity; velocity; swiftness; fleetness; quickness; agility.
Source: Webster’s Unabridged Dictionary 1913 Edition
Recent Word Finds
Word of the Day
18 April 2025
GROIN
(noun) the crease at the junction of the inner part of the thigh with the trunk together with the adjacent region and often including the external genitals
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