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).
It is not in the fact that the imperial system uses measures called pounds and ounces etc., but in the relationships between those measures. 16 ounces = 1 pound14 pounds = 1 stone8 stones = 1 hundredweightetc.nly in the imperial system of measures are mixed units allowed. That is, measurements like 19 feet 4 inches17 miles 13 yards 2 feet5 pounds 7 ounces3 tons 5 hundredweights 2 stonesetc In the SI or metric system mixed measures are not allowed, and they are certainly not necessary.