Medical Definition of afferent. : bearing or conducting inward; specifically : conveying impulses toward the central nervous systemâcompare efferent.
Imperial Weight Units. The imperial system of weights, or more correctly the avoirdupois system of weights is the standard system of weight in the United States and is still in common usage in the United Kingdom. The system is based on a pound (lb) of 16 ounces (oz).
1 The short hundredweight or cental of 100 lb (45.359237 kg) is used in the US and Canada. 2  The long or imperial hundredweight of 8 stone (112 lb or 50.802345 kg) sees informal use in the imperial system but was banned from commercial use in 1985.