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Boyden meal

[boid′n]
n.
  1. A meal consisting of three or four egg yolks, beaten up in milk and sweetened, used to test the evacuation time of the gallbladder.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.