| OPANAL Spanish Organismo para la Proscripción de las Armas Nucleares en la América Latina y el Caribe (Agency for the Prohibition of Nuclear Weapons in Latin America and the Caribbean) |
| 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. |
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