tisane

2. A medicinal drink made by steeping dried herbs or plant parts in hot water.

The healer prepared a tisane of chamomile to help him sleep.

3. Any light, aromatic infusion of leaves, flowers, or fruit served as a beverage.

The café offers a refreshing tisane of hibiscus and rosehip.

4. A barley-water or similar grain-based drink used historically as a soothing remedy.

In old cookbooks, a barley tisane was recommended for fevers.