hydrosol

noun2

1. •
   A sol (solid-in-liquid colloid) in which the continuous phase (dispersing medium) is water.
2. •
   An herbal distillate: an aqueous product, made from plants (especially herbs) via steam distillation (usually specifically hydrodistillation); such a product is a colloidal suspension of essential oils that also has some water-soluble components dissolved in the water.