One of the mysteries of the English language finally explained.
In many jellyfishes: any of several small, club-shaped sensory structures (usually four or eight) that project from the margin of the umbrella, typically containing statoliths and ocelli.
Late 19th century; earliest use found in Journal of the Royal Microscopical Society. From post-classical Latin rhopalium from ancient Greek ῥόπαλον club + scientific Latin -ium.
In this article we explore how to impress employers with a spot-on CV.