The Oils and Plants Aromatherapy Glossary gives definitions of Aromatherapy and Herbal Terms.

Here are the results for the letter h

Haematoma

Bruising - a localized swelling filled with blood

Haematuria

Blood in the urine

Haemostatic

Retarding or stopping the flow of blood within the blood vessels

Hepatic

Stimulates and aids function of liver and gall bladder.

Hepatotoxicity

Having a harmful or toxic effect on the liver.

Herbaceous

Leaf-like in texture and color ; pertaining to an herb

Hydrating

To supply water in order to restore or maintain fluid balance

Hydration

adding water

Hypertensive

Causing an increase in blood pressure

Hypervolaemia

An abnormal increase in blood volume

Hypoglycaemiant

Lowers blood sugar levels.

Hypotensive

Causing a reduction in blood pressure

Hypothalamus

The part of the brain that lies below the thalamus, forming the major portion of the ventral region of the diencephalon and functioning to regulate bodily temperature, certain metabolic processes, and other autonomic activities.

Hypotrophy

ageing

Hypoxaemia

Blood oxygen deficiency