Syllable division and stress derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
intramuscularly is an adverb meaning "in an intramuscular way". It carries one recorded sense.
in an intramuscular way
“administer the drug intramuscularly”
Definitions, synonyms and semantic relations for intramuscularly come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.