Definition: Sea level
Etymology
See sea. From Middle English level, from Old French livel, liveau, later nivel, niveau, from Latin libella (a balance, a level), diminutive of libra (a balance, a level).
Noun
sea level (countable and uncountable, plural sea levels)
- The nominal height of the surface of the oceans above which heights of geographical features and aircraft flight levels are measured.
Credits
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