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arrangee
arrangement
arrant
arras
array
arré
arrearage
arrears
arrector pili
arrest
arrest of judgment
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Arrhenius equation
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arrector pili
ar·rec·tor pi·li [ a rèk tawr plee ]


noun 
Definition:
 
muscle making hair stand up: a small muscle connecting a hair follicle to the dermis that contracts to make the hair stand erect in response to cold or fear
[< modern Latin, "raiser of hair"]
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