A pappadam (a.k.a. papad, poppadum, appalam) is a crisp, wafer-thin cracker made from ground lentils. In Indian cuisine they are often served as appetizers with little bowls of chutneys for dipping or as a crisp counterpoint to rich curries.
Pappadams come in fragile, brittle disks of about 15 per pack in either plain or seasoned varieties such as chile, cumin seed, or black pepper. My favorite brand is Lijat Papad—you’ll know them by their peculiar label, showing a chubby boy and a possessed pink bunny inexplicably sneaking up behind him. Take care when transporting and storing the crackers; they shatter quite easily.