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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

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lactase enzyme in small intestine need to digest milk sugar or lactose
lactose sugar found in milk
laminectomy surgical procedure which includes removal of a portion of the lamina, usually performed to treat hernantion or spinal canal stenosis
Landau-Kleffner Syndrome childhood disorder of unknown orign that can be identified by gradual or sudden loss of the ability to understand spoken language
laparascope thin tube with a tiny camera used to look inside body and surface of organs.
laparascopic lymph node sampling lymph nodes are removed through a viewing tube, which is inserted through a small incision in the abdomen
laparotomy surgical procedure that involves an incisionin the lower abdominal cavity
laryngeal neoplasms abnormal growth in the larynx

surgery to remove part or all of the larynx (voice box)

larynx voice box
lavage process of cleaning of an organ (usually stomach or bowels)
ligament flexible band of fibrous tissue that binds joints together
lipid fatty substance in the blood
liver largest organ in the body, removes toxins and makes bile
lobectomy removal of a lobe of a lung
local anesthesia anesthetic injected into the site of the operation to temporarily numb the area
low density lipoprotein (LDL) blood with large amounts of cholesterol
lumpectomy surgical procedure removing a tumor or lump and sometimes surrounding tissue
lymphadenectomy procedure in which lymph nodes are taken from the body for diagnostic purposes
lymphocyte group of white blood cells




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