[1] : The Collaborative International Dictionary of English v.0.48

tangram \tan"gram\, n. cf. trangram.
   a chinese toy made by cutting a square of thin wood, or other
   suitable material, into seven pieces, as shown in the cut,
   these pieces being capable of combination in various ways, so
   as to form a great number of different figures. it is now
   often used in primary schools as a means of instruction.
   1913 webster
see also:
trangram 

[2] : WordNet (r) 2.0

tangram
     n : a chinese puzzle consisting of a square divided into seven
         pieces that must be arranged to match particular designs

Tangram >> T Words
Tangram, definition of term: Tangram
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