longipinnateEtymologyFrom Latin longus (“long”) + pinnate, from pinna (“a fin”), see -ate (adjective-forming suffix) and -ate (noun-forming suffix). Doublet of longipennate.longipinnate means having long, extended flippers. Lexicurio rates it Sui generis — a strength score of 87 out of 100.adjHaving long, extended flippers.nounAn ichthyosaur having such flippers.