VOCABULARY. 



Abdomen, the cavity of the belly. 



Jlccretion, a growth ; increase in size or extent. ^ 



Adqjose, fatty, containing fat. 



JHhalies, a peculiar class of chemical substances which have the prop- 

 erty of combining with and neutralizing the properties of acids. 



^nconcBus, the name of one of the muscles which extend the elbow 

 joint. 



Anal, a term applied to one of the fins of fish, situated near the anus 

 or vent. 



Anhelation, breathing hard or panting. 



Annular, in the form of a ring. 



Jlnnuli, rings — applied to the muscular fibres which surround the bod- 

 ies of some animals like rings. 



Antennae, organs of touch, situated near the mouths of insects having 

 many joints. 



Antherae, small bodies which contain the pollen or fertilizing dust of 

 flowers ; the antherae are fixed generally on the ends of slender fil- 

 aments, and surround the germ or seed vessel. 



Aorta, the main artery of the body, which receives the blood direct- 

 ly from the heart and distributes it to the body. 



Auricle, a cavity of the heart. Its external shape gives it the appear- 

 ance of an appendage to the organ, and its name is derived from its 

 supposed resemblance to an ear, (auricula.) 



Automaton, a machine having a power of motion within itself, but 

 destitute of life. 



B. 



Buccinator, the principal muscle of the check. 



Biceps, one of the muscles which bend the elbow joint. 



Bivalve, consisting of two valves or shells, as in shell-fish — e. g. the 



oyster. 

 Brachiaus, the name of two muscles moving the arm. 

 Brexis, short. 



c. 



Calyx, the flower cup ; the external or outermost part of the flower, 

 generally resembling the leaves in colour, and containing the other 

 parts of the flower within it. It is often wanting. 



Camera obscura, or dark chamber. An optical instrument in which 

 the rays of light from external objects are made to pass through a 

 convex lens into a dark box where they are received upon a screen, 

 and produce a representation of external objects. 



