hematology
Americannoun
Other Word Forms
Derived Forms
Etymology
Origin of hematology
Explanation
Hematology is the branch of medicine that studies blood and diseases of the blood. It’s a word you’d hear at the hospital or doctor’s office, or if you’re having blood work done. Add an -ology to the end of a word and it means “the study of.” Medical fields such as neurology and cardiology relate to the brain and the heart, respectively. Then there’s hematology, which involves something that goes to the heart, brain, and everywhere else in the body: blood. Hematology involves diseases of the blood such as leukemia. The Greek root for blood (haima) also appears in blood-related words such as hemorrhage and hematoma.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Scientists already understand a great deal about the makeup and function of blood cells in humans and mice thanks to advances in hematology and immunology.
From Science Daily • May 27, 2026
Johnson & Johnson is also a key beneficiary in this space, the analyst wrote last month, citing its leadership in hematology and head start in potential markets like Sjogren’s disease and systemic lupus erythematous.
From Barron's • May 20, 2026
Sanofi SAN -0.66%decrease; red down pointing triangle said two bleeding disorder treatments for both chronic and acute conditions have been approved in China, expanding its hematology offerings in the country.
From The Wall Street Journal • Dec. 11, 2025
Floy Agnes Lee, known as Aggie, was a hematology technician at Los Alamos.
From Scientific American • Jul. 27, 2023
“You are a specialist in hematology employed by the Anacortes General Hospital— is that correct? Do I have that right?”
From "Snow Falling on Cedars: A Novel" by David Guterson
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
