Lissajous figure

Etymology
, who invented an apparatus that projected such figures onto a wall.

Noun

 * 1)  A plane curve traced by a point which executes two perpendicular independent harmonic motions, the frequencies of which are in a simple ratio.

Translations

 * Catalan: corba de Lissajous
 * Finnish: Lissajous'n kuvio
 * Russian: фигу́ра Лиссажу́