Mid 19th century; earliest use found in Joachim Stocqueler (1800–1885), writer. From classical Latin ponder-, ponduspondus + -ary. Compare French †pondéraire monetary.
Definition of ponderary in US English:
ponderary
adjectiveˈpɒnd(ə)rəri
rare
Ponderal.
Origin
Mid 19th century; earliest use found in Joachim Stocqueler (1800–1885), writer. From classical Latin ponder-, pondus pondus + -ary. Compare French † pondéraire monetary.