"Partial" icon in a comparison table

I'm making a table comparing the features in different offerings, using checkmarks and blank spaces to denote whether a feature is available or not. There are a few edge cases where there's partial support of a feature in one of the offerings. I'm planning to use a symbol as well as a one-word description (e.g. "Partial") in the table, with a tooltip explaining the feature shown on hover or finger tap.

What would be the most fitting symbol for this partial state?