Harvey ball
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English
[edit]Etymology
[edit]Named after Harvey L. Poppel, generally credited with inventing them in the 1970s.
Noun
[edit]Harvey ball (plural Harvey balls)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/6/65/Harveyballs.v2.svg/220px-Harveyballs.v2.svg.png)
- Any of a set of partially filled circular ideograms used to communicate qualitative information.