subject matter, content, message, substance - what a communication that is about something is about

movement - the act of changing the location of something; "the movement of cargo onto the vessel"

cannulation, cannulisation, cannulization, canulation, canulisation, canulization, intubation - the insertion of a cannula or tube into a hollow body organ

instillation, instillment, instilment - the introduction of a liquid (by pouring or injection) drop by drop

enclosing, envelopment, inclosure, enclosure - the act of enclosing something inside something else

injection - the forceful insertion of a substance under pressure

blood transfusion, transfusion - the introduction of blood or blood plasma into a vein or artery

perfusion - pumping a liquid into an organ or tissue (especially by way of blood vessels)