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 (rā-sē′mĭk, -sĕm′ĭk, rə-)
Of or relating to a chemical mixture that contains equal quantities of dextrorotatory and levorotatory forms of a compound and therefore does not rotate the plane of incident polarized light.


(rəˈsiːmɪk; -ˈsɛm-) or


(Chemistry) chem of, concerned with, or being a mixture of equal amounts of enantiomers and consequently having no optical activity
[C19: from raceme (as in racemic acid) + -ic]
racemism n


(reɪˈsi mɪk, -ˈsɛm ɪk, rə-)

noting or pertaining to any of various organic compounds that are optically inactive but separable into dextrorotatory and levorotatory forms.
References in periodicals archive ?
The increased plasma concentrations of dextromethorphan after dosing with AXS-09, which contains the chirally pure S-enantiomer of bupropion, are comparable to those achieved with dosing of the company's first generation product candidate AXS-05 which contains racemic bupropion.
Levobupivacaine is S-enantiomer of racemic bupivacaine with the similar clinical profile.
As an enantiomer of racemic methadone, REL-1017 has been shown to possess NMDA antagonist properties with virtually no opioid activity at the expected therapeutic doses.
Additionally, it provides access to both racemic and enantiopure solid-state architectures that can further impact the properties.
Additional studies have evaluated nebulized albuterol, racemic epinephrine, and corticosteroids.
Initial results from the firm's completed single ascending dose study indicated a potentially therapeutic dose range for d-Methadone without the side effects typically observed with racemic methadone in opioid naive subjects or with other NMDA inhibitors, such as ketamine.
Chiral Technologies, a leader in enantioselective chromatography, serves pharmaceutical and other life science industries and offers a portfolio of chiral stationary phases and analytical and preparative chiral columns for the separation of racemic mixtures into single enantiomers.
Her breathing symptoms had been unresponsive to steroids and racemic epinephrine.
Since naturally chiral sources of essential oils are generally more costly and have a greater perceived health benefit than their synthetic counterparts, rapid chiral analysis allows manufacturers to quickly exclude adulterated products containing inexpensive racemic synthetic materials at the time of purchase.
The second compound, racemic acid, was discovered in 1819 in the tartaric acid factory of an industrialist named Kestner.