The Collaborative International Dictionary of English v.0.48:

Tapeline \Tape"line`\, n.
   A painted tape, marked with linear dimensions, as inches,
   feet, etc., and often inclosed in a case, -- used for
   measuring.
   [1913 Webster]

WordNet (r) 3.0 (2006):

tapeline
    n 1: measuring instrument consisting of a narrow strip (cloth or
         metal) marked in inches or centimeters and used for
         measuring lengths; "the carpenter should have used his tape
         measure" [syn: tape, tapeline, tape measure]