Late 15th century; earliest use found in William Caxton (1415x24–1492), printer, merchant, and diplomat. From Middle French, French pesanteur from pesant + -eur.
Definition of pesanteur in US English:
pesanteur
nounˌpeɪzɒnˈtəː
rare
Heaviness, weight.
Origin
Late 15th century; earliest use found in William Caxton (1415x24–1492), printer, merchant, and diplomat. From Middle French, French pesanteur from pesant + -eur.