Source : Webster's Revised Unabridged Dictionary (1913)

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

Source : WordNet®

tapeline
     n : 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}, {tape measure}]