Early 19th century; earliest use found in Samuel Taylor Coleridge (1772–1834), poet, critic, and philosopher. From classical Latin prōsilient-, prōsiliēns, present participle of prōsilīre to leap forth from prō- + salīre to leap.
Definition of prosilient in US English:
prosilient
adjectiveprə(ʊ)ˈzɪlɪənt
rare
Outstanding, prominent.
Origin
Early 19th century; earliest use found in Samuel Taylor Coleridge (1772–1834), poet, critic, and philosopher. From classical Latin prōsilient-, prōsiliēns, present participle of prōsilīre to leap forth from prō- + salīre to leap.