Definition of Lissajous figure in English:

Lissajous figure

noun

Mathematics
  • Any of a number of characteristic looped or curved figures traced out by a point undergoing two independent simple harmonic motions at right angles with frequencies in a simple ratio.

    • ‘The hare is constrained to hop along the path of a Lissajous figure.’
    • ‘He obtained Lissajous figures by successively reflecting light from mirrors on two tuning forks vibrating at right angles.’

Origin

Late 19th century: named after Jules A. Lissajous (1822–80), French physicist.

Pronunciation:

Lissajous figure

/ˈlɪsaʒuː/