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| a chattering or flighty, light-headed person. |
| the offspring of a zebra and a donkey. |
gradient wind
wind that accounts for air flow along a curved trajectory. It is an extension of the concept of geostrophic wind-i.e., the wind assumed to move along straight and parallel isobars (lines of equal pressure). The gradient wind represents the actual wind better than does the geostrophic wind, especially when the wind speed and trajectory curvature are large, as they are in hurricanes and jet streams.
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