English
ambigram
From ambi- + -gram.
Formed from ambi- + -gram
The story
Coined by Douglas Hofstadter in 1983-1984.
Today it means
noun A calligraphic design that may be read as the same word or phrase (or sometimes different words or phrases) when oriented in two different ways, usually when reflected along a vertical or horizontal axis or when rotated through 180 degrees.
Language periods are conventional ranges, not dates for this word.
Etymograph / ambigram