In Google's dictionary, the word "human" is displayed with the o͞o
pronunciation symbol, whereas most other dictionaries I checked use the [standard IPA?] ü
.
Are these really interchangeable or is there a subtle difference? (or is it an American vs British English thing?)
Part of the issue is that the o͞o
seems less available in common computer fonts than the ü, so I'd opt for the second one.