escribed on page 773; Illus. page 207.

THERMOMETER. An instrument for determining temperature.

THORACIC DUCT. A canal which carries the chyle from its repository in
the abdomen to the large vein in the chest, near the heart.

THORAX. Chest.

TINCTURES. Medicines held in solution by alcohol.

TONIC. Defined on page 350.

TOPICAL. Local.

TOPOGRAPHY. Description in detail of a place; in hygiene, to determine
its adaptability to residence.

TORMINA. Griping of the bowels.

TORTICOLLIS. Stiffness or contraction of the muscles of the neck.
Wryneck.

TOURNIQUET. An instrument to stop bleeding. Illus. Fig. 252, page 890.

TRACHEA. Windpipe. See page 63.

TRANSLUCENT. Transmitting light, but not permitting objects to be seen
distinctly.

TRANSUDATION. Passage of liquid through the tissues of the body.

TRAUMATIC. Relating to a wound or injury.

TREPHINING. Removing a piece of bone by a cylindrical saw.

TRITURATE. To pulverize.

TROCAR. An instrument for removing fluids from cavities. It consists of
a perforator within a cylinder.

TRUNCATED. Shaped like a pyramid with its top cut off.

TRUSS. A mechanical appliance for preventing protrusion or
strangulation. Hernial support.

TUBERCLE. See pages 431 and 498.

TURN OF LIFE. The change of life when menstruation ceases.

TYMPANUM. Ear-drum. Illus. p. 109.

U

UMBILICAL. Of the navel; as umbilical hernia. Illus. page 883.

UMBILICAL CORD. A cord-like substance which conveys the blood to the
foetus from the placenta or afterbirth.

UMBILICUS. The Navel.

UNSTRIATED. Not grooved or striped.

URAEMIC. Pertaining to blood-poisoning from the presence of urea in the
circulation.

URATES. The pinkish deposit found in urine.

UREA. A constituent of the urine.

URETERS. The canals leading from the kidneys to the bladder. Illus.
pages 85 and 207.

URETHRA. The canal leading from the bladder outwards, by which the urine
is voided. Illus. page 207.

URETHROTOMY. The operation for opening the urethra for the removal of
stricture.

URIC ACID. A constituent of the urine.

URINARY FISTULA. Abnormal communication between the urinary passages and
the surface.

URINO-GENITAL ORGANS. Pertaining to the urinary and sexual organs.

UTERINE. Belonging or relating to the womb.

UTERINE CAVITY OR CANAL. From the month of the womb to a constriction
called the internal orifice, is a cylindrical space called the canal.
Above this to the fundus or base