Definition of protensity in US English:

protensity

noun

Psychology Philosophy
  • The quality of taking up time; the fact of having duration.

Origin

Late 19th century; earliest use found in Encyclopaedia Britannica. From classical Latin prōtēns-, past participial stem of prōtendere protend + -ity.

Pronunciation

protensity

/prəʊˈtɛnsɪti/