环形 Traditional form: 環形 Pinyin (reading): huánxíng Definitions: ring-shaped (math.) annulus Characters: 环 - bracelet, ring; to surround, to loop 形 - form, shape; to appear; to describe; to look Traditional characters: 環 - bracelet, ring; to surround, to loop 形 - form, shape; to appear; to describe; to look