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| a gadget; dingus; thingumbob. |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
exchange ex·change (ĭks-chānj')
v. ex·changed, ex·chang·ing, ex·chang·es
To substitute one thing for another. n.
The act of substituting one thing for another.