infusion (
http://definr.com/infusion)
n 1: a solution obtained by steeping or soaking a substance
(usually in water) [syn:
extract]
2: (medicine) the passive introduction of a substance (a fluid
or drug or electrolyte) into a vein or between tissues (as
by gravitational force)
3: 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"