/lɪsˈʒuː/ or /ˌliːˈsɑːʒuː/ (UK) /lɪˈʒuː/ (US)

Definitions

1. noun

A figure-eight or double-looped curve formed by two superimposed sine waves, typically of different frequencies and amplitudes, used in physics and mathematics to demonstrate the principles of vector addition and the interaction of periodic motions.

“The lissajous figure on the oscilloscope showed a clear, repeating pattern of the superimposed waves.”

2. proper noun

A French mathematician and engineer, Jules Antoine Lissajous, who invented the figure-eight curve in the 19th century.

“Lissajous was a renowned mathematician and physicist who made significant contributions to the field of electromagnetism.”