1) Balance 2) Laboratory equipment 
A microbalance is an instrument capable of making precise measurements of weight of objects of relatively small mass: of the order of a million parts of a gram. In comparison, a standard analytical balance is 100 times less sensitive; i.e. it is limited in precision to 0.1 milligrams. Microbalances are generally used in a laboratory as standalone ...
A balance designed for use in weighing unusually small samples of materials. ... (05 Mar 2000) ... 
Type: Term Pronunciation: mī′krō-bal′ănts Definitions: 1. A balance designed for use in weighing unusually small samples of materials.
[n] - balance for weighing very small objects
noun balance for weighing very small objects