What's the meaning of a Henge?

An overview on henges and their history.
Figures (I own none of the images within this presentation);
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www.themoderna...
www.heritage.n...
collectionsint...
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sacred.numbers...
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Noble, G and Brophy Cremation Practices and the Creation of Monument Complexes: The Neolithic Cremation Cemetery at Forteviot, Strathearn, Perth & Kinross, Scotland, and its comparanda, PPS 2017
www.nessofbrod...
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Cummings, L. 2019. Rethinking the henge monuments of the British Isles. Newcastle University
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en.wikipedia.o...
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www.researchga...
commons.wikime...
universityofgl...
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Bibliography
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[@LuisAldamiz]

Why no mention of continental "henges", usually called "rondels" and that are quite obviously at the origing of Eastern British "henges"'

[@shone_m]

Vatin in northern Serbia has circular mounds