- Widal's test
- Widal's test Wi*dal's" test, or Widal test Wi*dal" test or Widal reaction Wi*dal" reaction . [After Fernand Widal (b. 1862), French physician.] (Med.) A test for typhoid fever based on the fact that blood serum of one affected, in a bouillon culture of typhoid bacilli, causes the bacilli to agglutinate and lose their motility. [Webster 1913 Suppl.]
The Collaborative International Dictionary of English. 2000.