Definition from Wiktionary, the free dictionary
- Whereas the spelling of the unit of length varies between British (metre) and American (meter) English, the spelling of this suffix is -meter in both. -metre is a nonstandard alternative form found in British English.
- Words with the suffix -ometer always has a primary stress on the antepenultimate syllable: barometer, speedometer, tachometer, etc. Words derived from meter (or metre) with a prefix usually have a primary stress on the first syllable: centimeter, millimeter, etc.