lenticular

the word lenticular traces its lineage directly to the humble lentil. its origin is the latin word lens, lentis, meaning "lentil," which was used metaphorically due to the seed's distinctive double-convex shape. the diminutive form lenticula (a small lentil) gave rise to the late latin adjective lenticularis, meaning "shaped like a small lentil." entering english in the late 14th century, the term retained its core geometric meaning, first describing biconvex objects, and was later applied specifically to lenses and, in the 20th century, to similarly shaped cloud formations. the logic of the word beautifully connects a common bean to advanced optics through the shared property of a double-curved form.

Structure: lent (lentil) + ic (adjective suffix) + ular (adjective suffix) lent (from latin lenticula, a diminutive of lens, meaning "lentil"). ic (from latin -icus, a suffix forming adjectives, meaning "pertaining to"). ular (from latin -ularis, a diminutive or adjective-forming suffix, meaning "resembling" or "pertaining to").