Abbreviation for over the counter, pertaining to a drug available without a prescription.
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ornithine transcarbamylase; oval target cell; ovarian tissue culture; over-the-counter; oxytetracycline
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OTC abbr over-the-counter
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1. over the counter; applied to drugs not required by law to be sold on prescription only. 2. ornithine transcarbamoylase; see ornithine carbamoyltransferase.Medical dictionary. 2011.