e, producing a blurred image.

Atrophy (Gr. a, without, and trophe, nourishment). Wasting of a part from
lack of nutrition.

Auditory Nerve (Lat. _audio_, to hear). The special nerve of hearing.

Auricle (Lat. _auricula_, a little ear). A cavity of the heart.

Azygos (Gr. a, without, and zugos, a yoke). Without fellow; not paired.

Bacteria (bakterion, a staff). A microscopic, vegetable organism; certain
species are active agents in fermentation, while others appear to be the
cause of infectious diseases.

Bactericide (_Bacterium_ and Lat. _caedere_, to kill). Same as
_germicide_.

Bile. The gall, or peculiar secretion of the liver; a viscid, yellowish
fluid, and very bitter to the taste.

Biology (Gr. bios, life, and logos, discourse). The science which treats
of living bodies.

Bladder (Saxon _bleddra_, a bladder, a goblet). A bag, or sac, serving as
a receptacle of some secreted fluid, as the _gall bladder_, etc. The
receptacle of the urine in man and other animals.

Bright's Disease. A group of diseases of the kidney, first described by
Dr. Bright, an English physician.

Bronchi (Gr. brogchos, windpipe). The first two divisions, or branches, of
the trachea; one enters each lung.

Bronchial Tubes. The smaller branches of the trachea within the substance
of the lungs terminating in the air cells.

Bronchitis. Inflammation of the larger bronchial tubes; a "cold" affecting
the air passages.

Bunion. An enlargement and inflammation of the first joint of the great
toe.

Bursa. A pouch; a membranous sac interposed between parts which are
subject to movement, one on the other, to allow them to glide smoothly.

Callus (Lat. _calleo_, to be thick-skinned). Any excessive hardness of the
skin caused by friction or pressure.

Canal (Lat. _canalis_, a canal). A tube or passage.

Capillary (Lat. _capillus_, hair). The smallest blood-vessels, so called
because they are so minute.

Capsule (Lat. _capsula_, a little chest). A membranous bag enclosing a
part.

Carbon Dioxid, often called _carbonic acid_. The gas which is present in
the air breathed out from the lungs; a waste product of the animal kingdom
and a food of the vegetable kingdom.

Cardiac (Gr. kardia, the heart). The cardiac orifice of the stomach is the
upper one, and is near the heart; hence its name.

Carnivorous (Lat. _caro_, flesh, and _voro_, to devour). Subsisting upon
flesh.

Carron Oil. A mixture of equal parts of linseed oil and li