Megameter
Me*gam"e*ter\, n. [Mega- + -meter: cf. F. m['e]gam[`e]tre.] (Physics) 1. An instrument for determining longitude by observation of the stars. 2. A micrometer. [R.] --Knight.Megameter
Meg"a*me`ter\, Megametre \Meg"a*me`tre\, n. [Mega- + meter, metre, n., 2.] In the metric system, one million meters, or one thousand kilometers.