\Trail"ing\,
a. & vb. n. from {Trail}.
{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.