A microscope (device to magnify small objects) in which objects are lit directly by white light.
<instrument> The most common type of microscope (a device used to magnify small objects or substances) used in laboratories. The device works by passing visible light through a condenser and an objective lens. ... (09 Oct 1997) ... 
one in which the specimen is viewed under ordinary illumination.
Type: Term Definitions: 1. a class of microscope that forms a magnified image using visible light.
[n] - microscope consisting of an optical instrument that magnifies the image of an object
noun microscope consisting of an optical instrument that magnifies the image of an object