from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A cell in the blood of vertebrates that transports oxygen and carbon dioxide to and from the tissues. In mammals, the red blood cell is disk-shaped and biconcave, contains hemoglobin, and lacks a nucleus.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun hematology, cytology A type of cell in the blood of
vertebratesthat contains hemoglobinand transports oxygenfrom the lungsto the tissues; an erythrocyte.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a mature blood cell that contains hemoglobin to carry oxygen to the bodily tissues; a biconcave disc that has no nucleus
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