(medicine) the passive introduction of a substance (a fluid or drug or electrolyte) into a vein or between tissues (as by gravitational force)
(重力の力により)静脈や組織の間への、物質(液体や薬や電解液)の消極的導入
infusion
the act of infusing or introducing a certain modifying element or quality; "the team's continued success is attributable to a steady infusion of new talent"