polyacrylamide

[pol-ee-uh-kril-uh-mahyd, -mid, -ak-ruh-lam-ahyd, -id]

pol·y·a·cryl·a·mide

[pol-ee-uh-kril-uh-mahyd, -mid, -ak-ruh-lam-ahyd, -id]
noun Chemistry.
a white, solid, water-soluble polymer of acrylamide, used in secondary oil recovery, as a thickening agent, a flocculant, and an absorbent, and to separate macromolecules of different molecular weights.

Origin:
1940–45; poly- + acrylamide
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Polyacrylamide is always a great word to know.
So is alum. Does it mean:
a double sulfate analogous to potassium alum, as aluminum ammonium sulfate, with the formula R2SO4?X2(SO4)3?24H2O, where R is alkali metal or ammonium
like or containing an alkali, which neutralize acids to form salts and turn red litmus paper blue, or having a pH value greater than 7
American Heritage
Science Dictionary
polyacrylamide   (pŏl'ē-ə-krĭl'ə-mīd')  Pronunciation Key 
A white, water-soluble polymer containing repeating units of acrylamide (C3H5NO)and related to acrylic acid. Polyacrylamide is used in food packaging, adhesives, coatings, and paper manufacturing. It is also used to reduce soil erosion and as a gel for electrophoresis in the laboratory analysis of protein and DNA structures.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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