noun (plural polyabolos or polyaboloes; by analogy with diabolo, polyabolos would be the correct plural, but polyaboloes is just as commonly seen, if not more so)
Etymology: poly- + diabolo, (di)abolo, from the resemblance of a diabolo in cross-section to two right isosceles triangles joined at the vertices of their right angles
- (geometry) A polyform made by joining right isosceles triangles edge to edge in various arrangements.
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