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rhesus baby
Rhesus factor
rhesus monkey
Rhesus negative
Rhesus positive
rhetoric
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rheumatic fever
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rheobase
rhe·o·base [ r ō bàyss ] (plural rhe·o·bas·es)


noun 
Definition:
 
threshold nerve impulse: the minimum electrical nerve impulse necessary to cause a twitch in a muscle
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