subnormal

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subnormal

having a low intelligence, esp having an IQ of less than 70
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

subnormal

[səb′nȯr·məl]
(mathematics)
For a given point on a plane curve, the projection on the x axis of a rectangular coordinate system of the segment of the normal between the given point and the intersection of the normal with the x axis.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.