lenticule

noun

len·​ti·​cule ˈlen-tə-ˌkyül 

1

: any of the minute lenses on the base side of a film used in stereoscopic or color photography

2

: any of the tiny corrugations or grooves molded or embossed into the surface of a projection screen

Word History

Etymology

Latin lenticula

First Known Use

1942, in the meaning defined at sense 1