infusion

noun

• 1a drink, remedy, or extract prepared by soaking the leaves of a plant or herb in liquid.
• the process of preparing an extract by soaking the leaves of a plant in liquid.

• 2the introduction of a new element or quality into something:the infusion of $6.3 million for improvements an infusion of youthful talent
• Medicine the slow injection of a substance into a vein or tissue.