tail·ing /ˈtelɪŋ/
 裝尾巴,嵌入牆中磚石突出部,屑


 Tail·ing n.
 1. Arch. The part of a projecting stone or brick inserted in a wall.
 2. Surg. Same as Tail, n., 8 (a).
 3. Sexual intercourse. [Obs.]
 4. pl. The lighter parts of grain separated from the seed threshing and winnowing; chaff.
 5. pl. Mining The refuse part of stamped ore, thrown behind the tail of the buddle or washing apparatus. It is dressed over again to secure whatever metal may exist in it.  Called also tails.
 6. Elec. A prolongation of current in a telegraph line, due to capacity in the line and causing signals to run together.

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 tailing
      adj : following surreptitiously; keeping under surveillance;
            "always on guard against shadowing submarines" [syn: shadowing]
      n : the act of following someone secretly [syn: shadowing]