Saponins
Active plant constituents, that produce a detergent-like lather in water.
 

Scrofula
A particular, a form of tuberculosis inflammation of lymph nodes of the neck in children.
 

Sedative
A depressant, an agent that exerts a soothing or tranquilizing effect; sedatives may be general, local, nervous or vascular.
 

Sialagogue
An agent that stimulates the secretion of saliva and assists digestion of starches.
 

Soporific
Promotes sleep.
 

Stimulant
Increases internal heat, dispels internal chill and strengthens metabolism and circulation by temporarily speeding up the functional activity of a human tissue.
 

Stomachic
An agent that strengths and tones stomach functions. 
 

Styptic
Contracting a blood vessel; stopping a hemorrhage by astringent action.
 

Sudorific
Causing perspiration; see Diaphoretic.
 

Synergistic
The simultaneous action of two or more substances achieving an effect greater than that possible with any of the individual components alone.
 

Systemic
Relating to or affecting all body systems or organs; not localized in one spot or area.