OD

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OD

Informal
an overdose of a drug
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

OD

(optics)
(design engineering)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

OD

On drawings, abbr. for “outside diameter.”
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.