The fusion of biological membranes.
D002448:Cell Adhesion; D002462:Cell Membrane / Q000187:drug effects; D003102:Colloids; D008055:Lipids; D008074:Lipoproteins; D008244:Lysophosphatidylcholines / Q000494:pharmacology; D008247:Lysosomes / Q000187:drug effects / Q000201:enzymology; D008566:Membranes / Q000166:cytology* / Q000187:drug effects; D013268:Stimulation, Chemical; D014801:Vitamin A / Q000494:pharmacology
D003102:Colloids; D008055:Lipids; D008074:Lipoproteins; D008244:Lysophosphatidylcholines; D014801:Vitamin A