aggregometer
noun
ag·gre·gom·e·ter ˌa-gri-ˈgä-mə-tər 
plural aggregometers
medical
: an instrument for measuring the aggregation of platelets in a sample of blood
Finally, a clinically easy-to-use and accurate bedside platelet aggregometer may help deliver optimal antiplatelet therapy to our patients.
Steven P. Schulman, Journal of the American Medical Association, 20 Oct. 2004
Steven P. Schulman, Journal of the American Medical Association, 20 Oct. 2004Note: An aggregometer records the changes in the relative intensities of light passing through a sample of blood when it is treated with an agent (such as ADP or collagen) that acts to aggregate platelets.
aggregometry
ˌa-gri-ˈgä-mə-trē
noun The standard test of how readily platelets clump is called aggregometry. It is usually performed in a specialized laboratory and can take two to three hours. Andrew Pollack, New York Times, 20 July 2004
Andrew Pollack, New York Times, 20 July 2004 
Word History
Etymology
aggreg(ation) + -o- + -meter
First Known Use
1972, in the meaning defined above
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