Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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cell phone a telephone that operates using radio signals and therefore requires no wires. A cell phone can be taken with one anywhere but may not function if it is too far away from a radio transmitter to receive signals.
dry cell an electric battery cell in which the chemicals are stored as a paste that will not spill.
red blood cell a cell in the blood that carries oxygen to the body's tissues.
T cell a type of white blood cell that defends the body against certain diseases.
white blood cell a small blood cell with no color that helps protect the body against infections and bacteria.