noun, noun which may take the genitive case particle 'no'
spiral shape; swirl
Refers to a spiral or swirling form, often used as a noun or adjectivally with の.
彼女は渦巻き形の模様が好きだ。
She likes spiral patterns.
台風の雲は渦巻き形をしている。
The typhoon clouds form a spiral shape.
Compound of 渦巻き (uzumaki, 'whirlpool, spiral') + 形 (kata, 'shape, form').