Noun
squircle (plural squircles)
(algebraic geometry) A closed quartic curve having properties intermediate between those of a square and a circle.
Maybe incorporating the folder icon into a full squircle (ditching the ear in the background) and adding the Circle of Friends as a watermark would be a good fit. Source: Internet
Sketch plugin for create squircle shapes. Source: Internet
You just have to take every non-Suru icon and centre it on a grey squircle. Source: Internet