oat cell carcinoma

Medical Dictionary

oat cell carcinoma n.
A highly malignant carcinoma, especially of the lungs, composed of small ovoid undifferentiated cells. Also called small cell carcinoma.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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WordNet
oat cell carcinoma

noun
highly malignant carcinoma composed of small round or egg-shaped cells with little cytoplasm; lung cancers are frequently oat cell carcinomas 
WordNet® 3.0, © 2006 by Princeton University.
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