sinus histiocytosis with massive lymphadenopathy
A chronic disease that occurs in children and is characterized by massive painless cervical lymphadenopathy that is the result of distension of the lymphatic sinuses by macrophages containing ingested lymphocytes.
A massive new planet in our solar system named Tyche? Maybe. But what does “Tyche” mean?
There may be a new planet joining the solar system. A provocative hypothesis posed by a duo of planetary astronomers from the University of Louisiana-Lafayette includes the existence of the planet Tyche: a ninth planet estimated to be four times the size of Jupiter located somewhere at the outermost reaches of the solar system. It’s hard to know what is more enjoyable: stories about planets …
Wi-Fi & Apps: 9 Words of the Internet Age
Read more in this article about some frequently asked questions and fun facts related to our definitions.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.