The genus Ranunculus, of many species; some are common weeds, others are flowering plants of considerable beauty.
- Any of numerous plants of the genus Ranunculus that have palmately cleft or divided leaves, such as the buttercups.
- Any of several other plants having leaves or other parts somewhat resembling a bird's foot.
- 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.
- Nautical A set of small lines passed through holes of a batten or fitting to help support the backbone of an awning.