kalotropen.
/ˈkaləʊtrəʊp/ The name given to a kind of geometric thaumatrope.
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the world > physical sensation > sight and vision > optical instruments > instruments for observing > [noun] > thaumatrope
phenakistoscope1834
kalotrope1846
wheel of life1872
wheel of colour1877
1846 J. Joyce Sci. Dialogues xxii. 333 The Kalotrope is a modification of the dissolving views.
c1865 J. Wylde Circle of Sci. I. 77/2 Mr. Rose..has invented a very interesting instrument, which he calls the kalotrope.
This entry has not yet been fully updated (first published 1901; most recently modified version published online March 2018).
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n.1846