C Horizon 



In soils the unconsolidated, partly weathered rock frag- 

 ments from which the upper A and B Horizons (q. v.), have 

 developed; occasionally lacking, cf. D horizon. 



Chorology 



The study of regions or areas, cf. Synchorology. 



Chresard 



A term occasionally used for the water in soil that is 

 available to plants for absorption. 



Chromatic! 



One of the halves of a divided Chromosome. 



Chromatin 



Material in the nucleus and chromosomes which stains 

 deeply with certain dyes. 



Chromatophore 



(1) A Plastid (q. v.) which contains pigment in a plant 

 cell, e.g., Chloroplast, Chromoplast. (2) In animals a cell or 

 group of cells with pigment which has the capability of 

 changing color. 



Chromogenic 



Refers to the capability of an organism to produce color 

 in a substance, e.g., certain bacteria. 



Chromoplast 



A plastid other than a Chloroplast, containing pigment, 

 usually yellowish or red in color. 



Chromosome 



The threadlike or rodlike bodies bearing genes in the 

 cells of plants and animals, formed from chromatin during 

 the process of cell division. 



Chrysalis 



See Pupa. 



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