Cold Hardiness (Resistance) 



The capacity of an organism to tolerate low temperatures. 



Coleopteron 



An insect in the order Coleoptera, the beetles. 



Coleoptile 



The sheath surrounding the Plumule in the early seed- 

 ling stage of plants in the grass family. 



Coleorhiza 



The sheath surrounding the Radicle in the early seedling 

 stage of plants in the grass family. 



Collembolon 



A small primitive insect in the order Collembola, the 

 springtails. 



Collenchyma 



Elongated, living cells with walls usually thickened 

 mostly in the corners, common in stems of herbaceous plants. 



Colloid 



A substance in the colloidal state in which the dispersed 

 particles are larger than those in a true solution, ranging 

 from 0.001 to 0.1 micron in diameter. 



Colluvium 



Mixed deposits of soil material near the base of rather 

 steep slopes, accumulations from slides, soil creep, frost 

 action, and local wash. 



Colon 



The part of the large intestine excluding the rectum, of 

 Vertebrates. 



Colonial 



Refers to organisms that form Colonies (q. v.). 



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