Pronunciation: (ī-som'i-trē),[key] —n. 1. equality of measure.
2. Biol.equal growth rates in two parts of a developing organism.
3. Geog.equality with respect to height above sea level.
4. Math.a function from one metric space onto a second metric space having the property that the distance between two points in the first space is equal to the distance between the image points in the second space.