cornerless

The cornerless is a speciality commonly found amongst square individuals. They are characterized by seeming to miss all four of their corners which makes them look rounded, octagonal or inverted, whether it be by birth defect, accident or after a fight or an attack. The loss of corners does not have any physical consequences apart from apperiance, but individuals might feel traumatized or discriminated after the incident.

The word cornerless can be used as a noun or an adjective.

"My best friend is (a) cornerless. He lost his corners in a tragic accident involving falling off a cliff while on a segway"
"Cornerless cubes deserve rights too"