1. plural of rapidity; the quality or state of being rapid; swiftness or speed
Usage: formal

Examples

• The rapidities of the various chemical reactions were measured in the laboratory.
• Scientists compared the rapidities of different data processing methods.
• The study examined the rapidities of urban growth in developing countries.
• Different materials exhibit varying rapidities of heat conduction.
• The rapidities of technological changes have accelerated in recent decades.
• Researchers documented the rapidities of species adaptation in changing environments.