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).
USCS and Imperial also differed on several supplemental units; e.g., US hundredweight = 100 pounds, UK hundredweight = 112 pounds = 8 stone. A ton in each country was 20 hundredweight, but because of the difference in hundredweight, the US used a âshort tonâ of 2000 lbs, and the UK a âlong tonâ of 2240 lbs.