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[rit-l-in] /ˈrɪt l ɪn/
Pharmacology, Trademark.
a brand of methylphenidate in its hydrochloride form. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for Ritalin


trademark a preparation of methylphenidate, a drug related to amphetamine, used to treat attention deficit disorder in children
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for Ritalin

proprietary name (Ciba Ltd., originally in Switzerland) for drug methylphenidate hydrochloride, copyrighted 1948, years before the drug itself was marketed.

Online Etymology Dictionary, © 2010 Douglas Harper
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Ritalin in Medicine

Ritalin Rit·a·lin (rĭt'l-ĭn)

A trademark used for the stimulant, methylphenidate.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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