a. Any of numerous plants of the genus Ranunculus that have palmately cleft or divided leaves.

b. Any of several other plants having leaves or other parts somewhat resembling a bird's foot.

a. An iron ball with four spikes arranged so that one always points upwards, used to delay the advance of mounted troops and infantry; a caltrop.

b. Nautical A set of small lines passed through holes of a batten or fitting to help support the backbone of an awning.