Nickname for the Flores man (Homo floresiensis). Derived from the fictional race from J. R. R. Tolkien’s Middle-earth universe which first appears in the book The Hobbit.
- Hodgkin disease
This is a cancer that develops in the lymph system (lymphoma), part of the body’s immune system. Because there is lymph tissue in many areas of the body, Hodgkin disease can start in almost any part of the body. The cancer can spread to almost any organ or tissue in the body, including the liver, […]
- Hodgkin, Dorothy
British crystallographer and Nobel Prize winner (1910-1994). Dorothy Crowfoot, as she was born, was educated at Somerville College, Oxford. After a brief period as a postgraduate student at Cambridge University, she returned to Oxford in 1934 and spent her entire academic career there. After various appointments within the university, she became the first Royal Society […]
- Hogwarts headache
A generalized headache from spending many hours reading an unusually long volume such as one of J.K. Rowling’s Harry Potter books. The pain resolves one to two days after the patient finishes the book. The term was coined by Dr. Howard J. Bennett in a Letter to the Editor of The New England Journal of […]
- Holandric inheritance
Inheritance of genes on the Y chromosome. Because only males normally have Y chromosomes, Y-linked genes can only be transmitted from father to son.
- Hole, macular
A hole in the macula, the tiny oval area made up of millions of nerve cells located at the center of the retina responsible for sharp, central vision. The eye contains a jelly-like substance called the vitreous. Shrinking of the vitreous usually causes the hole. As a person ages, the vitreous becomes thicker and stringier […]