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medical dictionary online

Many terms frequently used in science and medicine are derived from latin words. By combining the root words with, prefixes and suffixes many of the meanings of the terms can be deciphered.

Use the following resources to better understand medical terms:

Medical Roots or Stems
Prefixes commonly used in medical terms
Suffixes commonly used in medical terms

Complete Glossary of Medical Root Words

a b c d e f g h i j k l m n o p q r s t u v w x y z

radial keratotomy a surgical procedure in which incisions are made into the epithelium of the cornea to correct refractive error
radiation use of high-energy radiation to kill cancer cells and shrink tumors
radical mastectomy surgical removal of the entire breast, the pectoral muscles and ancillary lymph nodes
radiculopathy pinched nerve usually from a herniated or slipped disk
radioisotope a radioactive material injected into the body so that nuclear scanner can make pictures
range of motion measurement of the extent to which a joint can go through all of its normal movements
rectocele condition in which weakening of the lwer vaginal wall causes the rectum to buldge into the vagina
regional anesthetic an anesthetic used to numb a portion of the body

gas exchange from air to the blood and from the blood to the body cells

respiratory system the group of organs responsible for carrying oxygen from the air to the bloodstream and for expelling carbon dioxide
rheumatic fever a childhood disease that may damage the heart valves or the outer lining of the heart
rigidity increased resistance to the passive movement of a limb
rupture break or tear in any organ or soft tissue.




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