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).
The UK Weights and Measures Act of 1878 first defined the imperial pound in terms of metric units (1lb = 453.59265g) , and in 1893 the Mendenhall Order defined the United States pound by describing a kilogram as equivalent to 2.20462 pounds.