high endothelial postcapillary venule n.
Any of a group of venules located in the lymph nodes, tonsils, and aggregated lymphatic follicles, having a high-walled endothelium through which blood lymphocytes migrate into the lymphatic parenchyma.
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| a fool or simpleton; ninny. |
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