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in·tra·mus·cu·lar -'məs-kyə-lər adj situated within, occurring within, or administered by entering a muscle <\intramuscular fat> <an \intramuscular injection>
in·tra·mus·cu·lar·ly adv
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adj.
within a muscle. An intramuscular injection is made into a muscle.
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in·tra·mus·cu·lar (in″trə-musґku-lər) within the substance of a muscle.Medical dictionary. 2011.