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 avoirdupois (or international) pound, used in both the imperial and US customary systems, is defined as exactly 0.453 592 37 kg, making one kilogram approximately equal to 2.2046 avoirdupois pounds.