I'm thinking of getting a SONOS sound system and have realised that it's an example of a special class of word. It's a palindrome, it's a rotational ambigram and it is also a word that is the same upside down.

Any palindrome that uses, exclusively, H I N O S X Z (also some versions of lower case f and l) will share this characteristic .

Is there a special name for this ?

  • 4
    it's only the same upside-down if rotated, rather than reflected. Jan 28, 2015 at 14:39
  • Thanks @PhilMJones. I've corrected my question. An additional term may be needed !
    – Dan
    Jan 28, 2015 at 15:27
  • Not answered there clearly. Would it be a dihedral or a tetradic ambigram !?
    – Dan
    Jan 29, 2015 at 13:38
  • It was answered quite clearly in the linked question. It is a rotational ambigram. Your question was is there a special name and the answer is that it is a rotational ambigram. If you want something more descriptive you'll need to append some extra words on there to modify it to fit your needs. Language, yo. Jan 29, 2015 at 21:38

1 Answer 1


Perhaps "palindromic rotational ambigram"? I just stuck "palindromic" on the front of "rotational ambigram".

I don't think there's a term with fewer than three words to describe what you want.

(I'm not sure the distinction from "rotational ambigram" is necessary, as most rotational ambigrams seem to be palindromic--I'm guessing designing those is just easier--but it's your language. More concise is okay, and more words are okay.)

  • 1
    People clever with fonts seem to be able to make all kinds of rotational ambigrams that are not palindromic - see, for example, the illustrations on the right column, for ambigram and chumps - en.wikipedia.org/wiki/Ambigram. But you are probably right that I should be happy with palindromic rotational ambigrams !
    – Dan
    Feb 7, 2015 at 21:06
  • (looking through old posts I see this should have had my tick - sorry for the delay!)
    – Dan
    Nov 6, 2015 at 10:43

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