Me*gam"e*ter (?), n. [Mega- + -meter: cf. F. m'egametre.] Physics
1.
An instrument for determining longitude by observation of the stars.
2.
A micrometer.
[R.]
Knight.
© Webster 1913.
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.
© Webster 1913.