Tangram is a 7 letter English word. It's valid Scrabble word worth 10 points. It's valid Words with friends word worth 13 points.
You can make 156 anagrams from letters in tangram (aagmnrt).
1860-65; tang-, perhaps Chinese Táng T'ang, i.e., Chinese + -gram1
tangram, tan′gram, n. a Chinese puzzle, consisting of a square of wood cut into seven pieces of various shapes.
One remarkable thing about these tangram pictures is that they suggest to the imagination such a lot that is not really there.