Etrog is a yellow citron or Citrus medica used by Jews during the week-long holiday of Sukkot as one of the four species. Together with the lulav, hadass, and aravah, the etrog is taken in hand and held or waved during specific portions of the holiday prayers. The etrog is a medium-sized citrus fruit, with a color, scent, and taste similar to a lemon. It is also known in English as the citron, though there is apparently more than one variety of citron. The etrog is surprisingly light in weight for its size, much lighter than you would expect for a comparably sized lemon. This is because the etrog is mostly rind, with very little pulp or juice. The etrog is also used in alcoholic beverages, candles, and soaps. However, its primary use is during the fall festival Sukkot, when it is united with palm, myrtle, and willow branches to form the Four Species. The etrog must be perfect in stem and body for ritual purposes. Special care is often given to selecting an etrog for the performance of the Sukkot holiday rituals.