or  valves of Kerck*ring  n pl :  PLICAE CIRCULARES
 
Kerck•ring, Theodor (1640-1693), Dutch anatomist. Kerckring was an anatomist and physician practicing in Amsterdam. In 1670 he described the permanent transverse folds of the luminal surface of the small intestine. Although they were previously described by Gabriele Falloppio, they are now sometimes called the valves of Kerckring.
 
 
 
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