piperonyl butoxide

 [pi-per-uh-nl, pahy-, pip-er-uh-nil]  

pi·per·o·nyl butox·ide

   [pi-per-uh-nl, pahy-, pip-er-uh-nil]
noun Chemistry.
a light-brown liquid, C19H30O5, used chiefly as a synergist in certain insecticides.
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Origin:
1940–45; piperon(al) + -yl; but- (from butyric) + oxide
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Piperonyl butoxide is always a great word to know.
So is atomic. Does it mean:
having an unsymmetrical arrangement of atoms in a molecule, or noting a carbon atom bonded to four different atoms or groups
existing as free, uncombined atoms
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