| cuckoo clock | |
| —n | |
| a clock in which a mechanical cuckoo pops out with a sound like a cuckoo's call when the clock strikes | |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |