Is there a technical name for such an image?
(image quality is poor, this was done by ripping frames from a video taken with my phone).
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Wouldn’t the “reverse” of a time-lapse be slow motion? 
I mean, a time-lapse photograph is actually a motion picture, but the motion here is implied; the photograph is actually still.
I don’t actually have an answer, I just thought I’d inject some pedantry. 
I’ve seen this same result using flashes firing multiple times throughout a single exposure, producing a similar result.
In that case the term was usually “stroboscopic”. Maybe something along those lines?
I think Pat nailed it.
Time-lapse composite?
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OK, so that will be pseudo-stroboscopic. Thanks all.
Or… double-exposure → triple-exposure → quadruple-exposure → multiple-exposure?
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D’oh! 