370 PRINCIPLES OF ANIMAL BIOLOGY 



Carnivorous {kar niv' o rus). Flesh-eating. 



Carotin {kar' o tin). One of two yellow substances associated Avith chlorophyll. 

 Carpal {kar' pal). One of a number of bones in the wrist in vertebrates. 

 Carpo-metacarpus {kar' po met a kar' pns). A compound bone in the wing of a bird, 



formed by the union of several of the metacarpals and carpals. 

 Cartilage {kar' ti laj). A flexible, somewhat translucent tissue composed of cells 



imbedded in a matrix, found on the ends of bones at joints and in other 



situations. 

 Cast {kast). A mass of rock formed within a cavity, as the cavity of a shell or of a 



mold formerly occupied by an animal. 

 Catabolism {ka tab' o liz'm). The aggregate of destructive processes comprised in 



metabolism. 

 Catalysis [ka taV i sis). A reaction produced by means of a catalyzer. 

 Catalyst {kaf a list). See catalyzer. 

 Catalytic agent {kaf a lit' ik). See catalyzer. 

 Catalyzer {kat' a W zer). A substance which brings about a reaction but is not 



consumed in that reaction. It probably participates in the reaction, but is 



promptly reformed. 

 Caudal {kaw' dal). Belonging to the tail. 



Caudata {kaw da' taj. An order of Amphibia comprising forms with tails (sala- 

 manders, newts). 

 Cecidomyia {se sid' o mi' ya). A genus of flies. 

 Cecidomyiidae {se sid' o mi' yi dee) A family of flies. 



Cell {sel). A mass of protoplasm containing a nucleus or nuclear material. 

 Cell doctrine {seV dok' trin). See cell theory. 



Cell inclusions {sel' in klu' zhunz). Non-living objects enclosed in cells. 

 Cell membrane {sel' mem' brane). A thin sheet either of differentiated protoplasm, or 



of some substance produced by protoplasm, surrounding a cell. 



Cell theory {sel' the' o ri). The theory that all animals and plants are composed of 

 similar units of structure called cells. The theory is now so well established as to 

 be more properly called the cell doctrine, and other features concerning physiology, 

 development, etc., may be included in it. 



Cellulose {sel' ii lose). The substance, one of the carbohydrates, of which the cell walls 

 of plants are commonly composed. 



Cell wall {sel' wawV). A non-living structure secreted by a cell around itself. It is 

 commonly composed of cellulose or chitin. 



Cement (se ment'). A binding material in the composition of teeth. 

 Cenozoic (se' no zo' ik). Pertaining to the most recent geological time prior to the 

 Psychozoic. 



Central nervous system {sen' tral ner' vus sis' tern). The brain and spinal cord. 



Centrolecithal {sen' troles' i thai). Having the yolk in the central portion; said of 

 eggs. 



Centrosome {sen' tro some). A minute body often present in a cell, usually near the 

 nucleus in an attraction-sphere, related in some way to the process of cell division. 



Centrosphere {sen' tro sfeer). Same as attraction-sphere. 



Centrum {sen' trum). The massive portion of a vertebra ventral tu the neural canal 

 in which the spinal cord rests. 



