Megameter

Me*gam"e*ter (?), n. [Mega- + -meter: cf. F. mégamètre.] (Physics) 1. An instrument for determining longitude by observation of the stars.

2. A micrometer. [R.] Knight.

{ Meg"a*me`ter, Meg"a*me`tre } (?), n. [Mega- + meter, metre, n., 2.] In the metric system, one million meters, or one thousand kilometers.