maybe you mean mochiko? it's glutinous rice flour, and, as drbabs says, it's used to make mochi (if you aren't making it from the sticky rice itself). it's used also as a thickener (in soups or gravies, for example), and i use it to make mochiko fried chicken, which is fried chicken with a thick batter of mochiko, egg, soy sauce, scallions, and sugar. i also make a gluten-free flour blend that uses mochiko.

A pre-Incan civilization that flourished on the northern coast of Peru from about 200 b.c. to a.d. 600, known especially for its pottery vessels modeled into naturalistic human and animal figures.

Do you mean mochi?
Mochi is a Japanese rice cake made of glutinous (sticky) rice pounded into paste and molded into shape.