pathway - Dictionary definition and pronunciation - Yahoo! Education
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path·way  audio  (pthw, päth-) KEY 

NOUN:
  1. A path.
  2. Physiology
    1. A course usually followed by a body part or process.
    2. A chain of nerve fibers along which impulses normally travel.
    3. A sequence of enzymatic or other reactions by which one biological material is converted to another.



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