What ◓ means
Its reading comes from the diagram or notation around it. Weather station plots use a station circle’s fill to show cloud cover. Harvey-ball rating charts split circles into segments to summarize qualitative comparisons. If ◓ stands in for one of those marks, the legend tells you what the fill represents.
The Harvey-ball system took shape in the 1970s to compare long columns of report data compactly; it later appeared in client presentations and comparison tables.
In an ordinary message, ◓ reads as a technical mark; without an agreed notation, the recipient cannot tell what it labels.
Don’t read the black half as a percentage until you see the legend.
Don't confuse it with
2Questions people ask
1Why does ◓ appear as a box?
Your font or app may lack a drawing for this character and substitute a box. A font with geometric-symbol coverage can show the half-filled circle.
How to type ◓
◓\25D3Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.