1. The buttercup.

2. A caltrop.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• clawfoot,
• coksfoot,
• xrowfoot,
• vrowfoot,
• frowfoot,
• drowfoot,
• ceowfoot,
• crosfoot,
• crofoot,
• crowfot,
• krowfoot,
• plowfot,
• crowsgoot,
• crowsofot,
• crosefoot,
• crowfeat,
• Clawfout,
• Clowfoot,
• crowfut,
• crawfoot

• crofoot.

The adjective form of the word "crowfoot" is "crowfooted".

The plural of the "crowfoot" can be the "crowfoots".

The singular of the "crowfoot" can be the "crowfoot".