| safety chain | |
| —n | |
| Also called: guard a chain on the fastening of a bracelet, watch, etc, to ensure that it cannot open enough to fall off accidentally | |
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| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |