The movement of a phospholipid molecule from one leaflet of a membrane bilayer to the opposite leaflet. [ http://www.ncbi.nlm.nih.gov/pubmed/20302864 https://www.worldcat.org/search?q=bn%3A0815316194 http://www.ncbi.nlm.nih.gov/pubmed/16452632 http://www.ncbi.nlm.nih.gov/pubmed/20043909 ]
Term information
Note that this term describes the transbilayer motion of individual phospholipid molecules, and should not be confused with 'phospholipid scrambling ; GO:0017121'.