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Definition:
the great circle on the celestial sphere midway between the celestial poles
Your choice?
- equisetum fluviatile (Definition: Eurasia; northern North America to Virginia)
- equivocation (Definition: deliberate vagueness or ambiguity)
- equinoctial
- equus caballus przevalskii (Definition: wild horse of central Asia that resembles an ass; now endangered)
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