| admiral | (noun) any of several brightly colored butterflies | - |
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| (noun) the supreme commander of a fleet; ranks above a vice admiral and below a fleet admiral | Synonyms: full admiral |
| antiviral | (adjective) inhibiting or stopping the growth and reproduction of viruses | - |
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| (noun) any drug that destroys viruses | Synonyms: antiviral agent, antiviral drug |
| spiral | (adjective) in the shape of a coil | Synonyms: coiling, helical, spiraling, spiralling, turbinate, volute, voluted, whorled |
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| (noun) flying downward in a helical path with a large radius | - |
| (noun) a structure consisting of something wound in a continuous series of loops | Synonyms: coil, helix, volute, whorl |
| (noun) ornament consisting of a curve on a plane that winds around a center with an increasing distance from the center | Synonyms: volute |
| (noun) a continuously accelerating change in the economy | - |
| (noun) a plane curve traced by a point circling about the center but at increasing distances from the center | - |
| (noun) a curve that lies on the surface of a cylinder or cone and cuts the element at a constant angle | Synonyms: helix |
| (verb) to wind or move in a spiral course | Synonyms: coil, gyrate |
| (verb) move in a spiral or zigzag course | Synonyms: corkscrew |
| (verb) form a spiral | - |
| viral | (adjective) relating to or caused by a virus | - |
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