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Maths of, signifying, or relating to a quantity or number that is not an exact divisor of a given quantity or number
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
A part of a sample that has been divided into a set of equal parts plus a smaller remainder part.
A divisor that does not divide a quantity into equal parts.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.