Yes, metric is a Scrabble word!

Adjective

1. Based on the meter as a standard of measurement

2. The rhythmic arrangement of syllables

Noun

1. A function of a topological space that gives, for any two points in the space, a value equal to the distance between them

2. A decimal unit of measurement of the metric system (based on meters and kilograms and seconds)

3. A system of related measures that facilitates the quantification of some particular characteristic