| mean sea level | <marine biology> A tidal datum: the arithmetic mean of hourly water elevations observed over a specific 19-year cycle. Points on land can be referenced to a mean sea level, in which case the datum assumes zero elevation. (09 Oct 1997) |
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| mean temperature | The average atmospheric temperature in any locality for a designated period of time, as a month or a year. (05 Mar 2000) |
| mean vector | A single cardiac vector representing the average of all vector's present during a given time interval. Synonym: mean manifest vector. (05 Mar 2000) |
| meander | To wind or turn in a course or passage; to be intricate. "Five miles meandering with a mazy motion Through wood and dale the sacred river ran." (Coleridge) Origin: Meandered; Meandering. Source: Websters Dictionary (01 Mar 1998) |
| meandrina | <zoology> A genus of corals with meandering grooves and ridges, including the brain corals. Origin: NL., cf. F. Meandrine. Source: Websters Dictionary (01 Mar 1998) |