right|thumb|320px|An arbelos (grey region) thumb|Arbelos sculpture in Kaatsheuvel, Netherlands
right|thumb|320px|An arbelos (grey region) thumb|Arbelos sculpture in Kaatsheuvel, Netherlands
In geometry, an arbelos is a plane region bounded by three semicircles with three apexes such that each corner of each semicircle is shared with one of the others (connected), all on the same side of a straight line (the baseline) that contains their diameters.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).