Any microtubule bundle that is part of a cytoplasm. [ GOC:TermGenie http://purl.obolibrary.org/obo/go/references/0000064 http://www.ncbi.nlm.nih.gov/pubmed/26124291 http://www.ncbi.nlm.nih.gov/pubmed/11007487 ]
Synonyms: microtubule bundle of cytoplasm microtubule fascicle of cytoplasm