* Geography: Indo-Gangetic Plain, Indo-Pacific region
* Culture: Indo-Aryan languages, Indo-Islamic architecture
* Ethnicity: Indo-Aryan people
* Science: Indo-European languages, Indo-Tibetan languages
Other possible meanings:
* "Indonesian" is sometimes abbreviated as "Indo."
* "Indium" is a chemical element with the symbol "In."
The specific meaning of "indo" will depend on the context in which it is used.
For example:
* "Indo-European languages" refers to a family of languages that originated in the Indo-European homeland, which is believed to be located in the Pontic-Caspian Steppe.
* "Indo-Pacific region" refers to the geographical area that includes the Indian Ocean and the Pacific Ocean.
If you can provide more context, I can help you determine the specific meaning of "indo" in your case.