Macrometer n. : An instrument for determining the size or distance of inaccessible objects by means of two reflectors on a common sextant.

Example:


Taxonomy
Macrometer, free encyclopedia, mirrors, instrument, search, Unsourced, distant objects, compute, The distance, angular size, actual size, Interferometric, Surveyor, based system, Personal tools, Interaction, Toolbox, non-profit organization.

Defination from the web:
Macrometer. From Wikipedia, the free encyclopedia. Jump to: navigation, search. This article does not cite any references or sources. ... A macrometer is an instrument for measuring the size and distance of distant objects. ...