potamo-, potam- (Greek: river, stream).autopotamous, autopotamic: 
A reference to organisms adapted to stream environment and which complete their life cycles in streams.
 
benthopotamous: 
Living on the bed (bottom) of a river or stream.
 
eupotamic: 
Pertaining to an aquatic organism thriving in both flowing and standing fresh water.
 
hippopotamic: 
Belonging to, like, or suggesting a hippopotamus; huge, unwieldly.
 
hippopotamoid: 
Resembling a hippopotamus.
 
hippopotamus: 
A pachydermatous quadruped, the African river-horse.  
2. Hippopotamus amphibius, a very large beast with a thick heavy hairless body, large muzzle and tusks, and short legs, inhabiting manyh African rivers, lakes, and estuaries. Mesopotamia: 
A proper name for the tract between the Tigris and the Euphrates rivers. Sometimes used allusively in the etymological sense for a tract (in the middle) between two rivers.
 
Mesopotamian: 
1. A reference to the area of Mesopotamia.  
2. A native or inhabitant of Mesopotamia (the larger part of which is now Iraq). mesopotamic: 
A district between two rivers.
 
potamian: 
1. A river tortoise or a mud turtle.  
2. Of or pertaining to the Potamites or Trionychidae, the soft-shelled river tortoises. potamic: 
Pertaining to rivers, or transport by river currents; fluviatile.
 
potamicolous, potamicole: 
Living or thriving in rivers.
 
potamium: 
A community of river dwellers.
 
potamodromous: 
A reference to an organism that migrates only within fresh-river water.
 
Potamogale, Potamogalidae: 
A small family of West African insectivores strongly resembling otters in appearance.
 
Potamogeton: 
In botany, a genus of floating freshwater plants; a pondweed.
 
potamographer: 
A specialist in the description of rivers.
 
potamography, potamographic: 
The physiography (an account or description) of rivers; potamology.
 
potamologist: 
A specialist in the study of rivers.
 
potamology, potamological: 
In hydrology, the study of rivers.
 
potamometer: 
An instrument for measuring the force of a river current.
 
potamophile: 
Someone (or something) who is fond of rivers.
 
potamophilous, potamophily: 
Thriving in rivers; a fondness for rivers.
 
potamophobia: 
1. A dread or fear of rivers. 
 
potamophyte: 
A river plant.
 
potamoplankton: 
Planktonic organisms of slow-moving streams and rivers.
 
potamous: 
A reference to the lower reaches of rivers and streams.
 
tychopotamic: 
A reference to aquatic organisms thriving in the still back waters of rivers and streams.
 
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