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awhirl
awkward
awl
awn
awning
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awoken
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ax
axel
Axel Heiberg Island
axenic
axes
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axial plane
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axon

ax·on [ ák sòn ] (plural ax·ons)


noun 
Definition:
 
extension of nerve cell: an extension of a nerve cell, similar in shape to a thread, that transmits impulses outward from the cell body

[Late 19th century. < Greek axōn "axis"]
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