Sedatives. Medicines which allay irritation or irritability of the nervous system.
Sedentary. Requiring much sitting.
Self-pollution. See Self-abuse.
Semen. The secretion of the testicles which is thrown out during sexual intercourse and contains the principle of generation.
Semi-fluid. Half fluid.
Semilunar Valves. Valves in the heart. See 9 and 17, Fig. 41, [page 58].
Seminal vesicles. Reservoirs for the sperm. See Seminal Sac, on [page 207].
Septic. That which corrodes or produces putrefaction.
Septicæmia. Blood-poisoning; usually by absorption.
Sequel. That which follows; the condition or malady which follows a disease.