Glossary 



Abdomen Belly; the ventral side of the fish surrounding the digestive 

 and reproductive organs. 



Abdominal Pertaining to the belly. 



Abrasion A spot scraped of skin, mucous membrane, or superficial 

 epithelium. 



Abscess A localized collection of necrotic debris and white blood cells 

 surrounded by inflamed tissue. 



Acclimatization The adaptation of fishes to a new environment or habi- 

 tat or to different climatic conditions. 



Acre-Foot A water volume equivalent to that covering a surface area of 

 one acre to a depth of one foot; equal to 326,000 gallons or 2,718,000 

 pounds of water. 



Acriflavin A mixture of 2,8-diamino- lO-methylacridinium chloride and 

 2,8-diaminoacridine. Used as an external disinfectant, especially of liv- 

 ing fish eggs. 



Activated Sludge Process A system in which organic waste continually 

 is circulated in the presence of oxygen and digested by aerobic bac- 

 teria. 



Acute Having a short and relatively severe course; for example, acute 

 inflammation. 



Acute Catarrhal Enteritis See Infectious Pancreatic Necrosis. 



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