GLOSSARY 355 



like). An extremely thin covering of the brain and spinal cord. It 



lies between the dura mater and the pia mater. 

 Ar'bor Vi'tae (L). Literally, "the tree of life"; a name given to the 



peculiar appearance presented by a section of the cerebellum. 

 Ar'ter-y (Gr. a-fip, aer, air, and r-fjpfiv, terein, to contain). A vessel by 



which blood is conveyed away from the heart. It was supposed by 



the ancients to contain air ; hence, the name. 

 Ar-tic-u-la'tion (L. articulo, to form a joint). The more or less movable 



union of bones, etc.; a joint. 

 A-ryt'e-noid Car'ti-la-ges (Gr. aptTcuva, arutaina, a pitcher). Two small 



cartilages of the larynx, resembling the mouth of a pitcher. 

 As-sim-i-la'tion (L. ad, to, and similis, like). The conversion of food 



into living tissue. 



Au-di'tion (L. audio, to hear). The act of hearing sounds. 

 Au'di-to-ry Nerve. One of the cranial nerves ; it is the special nerve 



of hearing. 



Au'ri-cle (L. auris, the ear). A cavity of the heart. 

 Bar'i-tone (Gr. papfa, barus, heavy, and ri^os, tonos, tone). A variety of 



male voice between the bass and tenor. 

 Bel-la-don'na (It. beautiful lady). A vegetable narcotic poison. It has 



the property of enlarging the pupil, and thus increasing the brilliancy 



of the eye ; so called from its use by Italian ladies. 

 Bi-cus'pid (L. bi, two, and cuspis, prominence). The name of the 



fourth and fifth teeth on each side of the jaw ; possessing two 



prominences. 

 Bile. The gall, or peculiar secretion of the liver ; a viscid, yellowish 



fluid, and very bitter to the taste. 

 Bron'chi (Gr. ppbyxos, bronchos, the windpipe). The two first divisions 



or branches of the trachea ; one enters each lung. 



Bron'chi-al Tubes. The smaller branches of the trachea within the sub- 

 stance of the lungs, terminating in the air-cells. 

 Bron-chi'tis (from bronchia, and itis, a suffix signifying inflammation). 



An inflammation of the larger bronchial tubes; a "cold" affecting 



the lungs. 



Cal-ca're-ous (L. calx, lime). Containing lime. 

 Ca-nal' (L.). In the body, any tube or passage. 

 Ca-nine' (L. canis, a dog). Name given to the third tooth on each side of 



the jaw ; in the upper jaw it is also known as the eye-tooth, pointed 



like the tusks of a dog. 

 Cap'il-la-ry (L. capil'lus, a hair, capilla'ris, hair-like). The name of 



the extremely minute blood-vessels which connect the arteries with 



the veins. 



Car'bon Di-ox'ide (C02) . Chemical name for carbonic acid gas. 

 Car-bon'ic A'cid. The gas which is present in the air expire'd from the 



