Antonyms of adj pinwheel-shaped

1 sense of pinwheel-shaped

Sense 1
pinwheel-shaped -- (having the round shape of a pinwheel)

INDIRECT (VIA round) -> square -- (having four equal sides and four right angles or forming a right angle; "a square peg in a round hole"; "a square corner")

Similarity of adj pinwheel-shaped

1 sense of pinwheel-shaped

Sense 1
pinwheel-shaped -- (having the round shape of a pinwheel)
       => round (vs. square), circular -- (having a circular shape)