ell /ˈɛl/
 厄爾,L的字,L形之物
 L n.
 1. An extension at right angles to the length of a main building, giving to the ground plan a form resembling the letter L; sometimes less properly applied to a narrower, or lower, extension in the direction of the length of the main building; a wing. [Written also ell.]
 2. Mech. A short right-angled pipe fitting, used in connecting two pipes at right angles. [Written also ell.]
 Ell n.  A measure for cloth; -- now rarely used. It is of different lengths in different countries; the English ell being 45 inches, the Dutch or Flemish ell 27, the Scotch about 37.
 Ell, n. Arch. See L.
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 ell
      n : an extension at the end and at right angles to the main
          building