Look up: hemocytometer

1. 
   Hemocytometer
   The hemocytometer is a device originally used to count blood cells. It is now used to count other cells and many types of microscopic particles. It consists of a thick glass microscope slide with a rectangular indentation that creates a chamber. This chamber is etched with a grid of perpendicular lines. The device is carefully crafted so that the area bounded by the lines is known, and the depth of the chamber is also known. Therefore it is poss...
   Found on http://en.wikipedia.org/wiki/Hemocytomet
   
   
2. 
   hemocytometer
   (he″mo-si-tom´ә-tәr) a device used in manual blood cell counts consisting of a counting chamber of uniform depth that is covered by a ruled cover glass so that the region under each ruled square contains a known volume of the diluted blood specimen.
   Found on http://www.mercksource.com/pp/us/cns/cns
   
   
3. 
   hemocytometer
   hemocytometer, haemocytometer, hemacytometer 1. An instrument for counting the blood cells in a measured volume of blood. 2. A device used in manual blood counts, consisting of a microscopic slide with a depression whose base is marked in grids, and into which a measured volume of a sample of blood or bacterial culture is placed and covered with a cover glass. The number of cells and for...
   Found on http://www.wordinfo.info/words/index/inf
   
   
4. 
   Hemocytometer
   Microscope slide designed as a counting chamber of known volume; originally for blood cells; also used for microorganisms
   Found on http://www.dyerlabs.com/glossary/microbi