| us air force | |
noun | |
| the airforce of the United States of America; the agency that defends the United States through control and exploitation of air and space [syn: United States Air Force] |
| 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. |
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