strobicadj.
/ˈstrɒbɪk/ That has a spinning motion. strobic circles n. sets of concentric circles, toothed wheels, and the like, which appear to revolve when the surface on which they are inscribed is moved about.
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the world > physical sensation > sight and vision > thing seen > optical illusion > [noun] > an optical illusion > optical distortions > demonstrations of
phantasmagoria1801
strobic circles1880
Müller-Lyer1895
Necker cube1901
pseudoscopy1910
the world > space > shape > curvature > roundness > [noun] > circularity > a circle > a concentric circle > specific concentric circles
strobic circles1880
1880 S. P. Thompson in Brain 3 293 If two such ‘strobic circles’ (as I have called them) are printed side by side.
This entry has not yet been fully updated (first published 1919; most recently modified version published online September 2019).
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adj.1880