ll.

Sputum, pi. Sputa (Lat. _spuo_, _sputum_, to _spit_). The matter which is
coughed up from the air passages.

Stapes. Literally, a stirrup; one of the small bones of the middle ear.

Stimulant (Lat. _stimulo_, to prick or goad on). An agent which causes an
increase of vital activity in the body or in any of its parts.

Striated (Lat. _strio_, to furnish with channels). Marked with fine lines.

Styptics (Gr. stuptikos astringent). Substances used to produce a
contraction or shrinking of living tissues.

Subclavian Vein (Lat. _sub_, under, and _clavis_, a key). The great vein
bringing back the blood from the arm and side of the head; so called
because it is situated underneath the _clavicle_, or collar bone.

Superior Vena Cava (Lat., upper hollow vein). The great vein of the upper
part of the body.

Suture (Lat. _sutura_, a seam). The union of certain bones of the skull
by the interlocking of jagged edges.

Sympathetic System of Nerves. A double chain of nervous ganglia, situated
chiefly in front of, and on each side of, the spinal column.

Symptom (Gr. syn, with, and pipto, to fall). A sign or token of disease.

Synovial (Gr. syn, with, and oon, an egg). The liquid which lubricates the
joints; joint-oil. It resembles the white of a raw egg.

System. A number of different organs, of similar structures, distributed
throughout the body and performing similar functions.

Systemic. Belonging to the system, or body, as a whole.

Systole (Gr. sustello, to contract). The contraction of the heart, by
which the blood is expelled from that organ.

Tactile (Lat. _tactus_, touch). Relating to the sense of touch.

Tartar. A hard crust which forms on the teeth, and is composed of salivary
mucus, animal matter, and a compound of lime.

Temporal (Lat. _tempus_, time, and _tempora_, the temples). Pertaining to
the temples; so called because the hair begins to turn white with age in
that portion of the scalp.

Tendon (Lat. _tendo_, to stretch). The white, fibrous cord, or band, by
which a muscle is attached to a bone; a sinew.

Tetanus (Gr. teino, to stretch). A disease marked by persistent
contractions of all or some of the voluntary muscles; those of the jaw are
sometimes solely affected; the disorder is then termed lockjaw.

Thorax (Gr. thoraxi, a breast-plate). The upper cavity of the trunk of the
body, containing the lungs, heart, etc.; the chest.

Thyroid (Gr. thureos, a shield, and ei#x313;dos, form). T