Does anyone have ideas on how these features can be made to work on mobile?

For example, at http://ctext.org/dictionary.pl?if=en&id=1102 you can hover over the words to see meanings, or click on them to see in the dictionary. What is the analogue on phones, for “hover” versus “click”? What does the ctext project think about phones? (For context, I'm hoping to do something similar for Sanskrit someday…)