Noun

• 1. the growth rates in different parts of a growing organism are the same

• 2. a one-to-one mapping of one metric space into another metric space that preserves the distances between each pair of points;

  "the isometries of the cube"

• 3. equality of elevation above sea level

• 4. equality of measure (e.g., equality of height above sea level or equality of loudness etc.)