| 释义 |
WordReference Random House Unabridged Dictionary of American English © 2024artifi′cial hori′zon, - Astronomya level, as a surface of mercury, used in determining the altitudes of stars. Cf. level (def. 7).
- Astronomythe bubble in a sextant or octant for aerial use.
- AeronauticsAlso called flight indicator, gyro horizon. an instrument that indicates the banking and pitch of an aircraft with respect to the horizon.
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