a drawing, diagram, or other symbol that represents a specific quantity of or other fact about the thing depicted: Every isotype of a house on that chart represents a thousand new houses.
a statistical graph, chart, diagram, etc., that employs such symbols.
Biology. any of two or more separate populations of the same or a similar type.
Immunology. any antigenic determinant that is common to all individuals in a species.

1880–85; iso- + type Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

isotype i·so·type (ī'sə-tīp')
An antigenic marker that occurs in all members of a subclass of an immunoglobulin class.

i'so·typ'ic (-tĭp'ĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
But once the isotype batteries are used up they will be disposed of only through authorized agents of the manufacturer.
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