Sentence:  <WSD>"Lymphatism</WSD>". Post-mortem examination on a boy 10 years of age who died after receiving a blow on the head revealed a thymus gland of considerable bulk, 4 inches long. 
Meaning of the word marked with <WSD> tags:  Enlargement or swelling of the lymphatic tissue, associated in the past with sudden death of children but no longer considered to be an authentic ailment.