xoconozlte

[David L. Frye]

In San Luis Potosi there is a cactus -- looks roughly like an organ cactus
or pitahaya -- that is called joconoiste or joconostle, which (in local
speech) would derive from xoconoztli or possibly xoconochtli. If I
remember correctly, it has a yellow fruit roughly the size and appearance
of a tuna (prickly pear, nochtli) which is sour and can be added to soup
like limon.

David Frye, University of Michigan (dfrye at umich.edu)

PS, a great source for looking these things up is Santamaria's Diccionario
de Mejicanismos.