The Collaborative International Dictionary of English v.0.48:
Trailing \Trail"ing\, a. & vb. n. from Trail. [1913 Webster] Trailing arbutus. (Bot.) See under Arbutus. Trailing spring, a spring fixed in the axle box of the trailing wheels of a locomotive engine, and so placed as to assist in deadening any shock which may occur. --Weale. Trailing wheel, a hind wheel of a locomotive when it is not a driving wheel; also, one of the hind wheels of a carriage. [1913 Webster]