Antonyms of adj sickle-shaped

1 sense of sickle-shaped

Sense 1
falcate, falciform, sickle-shaped -- (curved like a sickle; "a falcate leaf"; "falcate claws"; "the falcate moon")

INDIRECT (VIA curved) -> straight -- (free from curves or angles; "a straight line")

Similarity of adj sickle-shaped

1 sense of sickle-shaped

Sense 1
falcate, falciform, sickle-shaped -- (curved like a sickle; "a falcate leaf"; "falcate claws"; "the falcate moon")
       => curved (vs. straight), curving -- (having or marked by a curve or smoothly rounded bend; "the curved tusks of a walrus"; "his curved lips suggested a smile but his eyes were hard")