spirograph
Noun
Meaning
An instrument for recording the respiratory movements, as the sphygmograph does those of the pulse.
Source: Webster's dictionarySynonyms
parabola
curvilinear
pantograph
cycloid
hypocycloid
lemniscate
ellipsograph
hyperbola
epicycloid
trochoid
hypotrochoid
epitrochoid
conic section
Lissajous figure
cyclograph
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