When astronomers search for habitable exoplanets, axial tilt is a key variable. A planet with 0° tilt might have frozen poles and a scorched equator, with no mechanism to distribute heat. A planet with a tilt > 54° (a "high-obliquity" world) would experience extreme seasons where the poles become the warmest regions.
Therefore, while Earth's axial tilt is correctly termed "obliquity," the leaning of a structural column is correctly termed "tilt." tilted axis definition
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