The kidneys are a pair of organs on either side of the spine in the lower abdomen. Each kidney is about the size of a fist. Attached to the top of each kidney is an adrenal gland. A mass of fatty tissue and an outer layer of fibrous tissue (Gerota's fascia) enclose the kidneys and adrenal glands.
A roll of duct tape. A roll of duct tape. The definition of a roll is something that's been coiled or twisted into a cylinder. An example of a roll is duct tape.
late 14c., roll of parchment containing writing, large book, from Old French volume, from Latin volumen (genitive voluminis) roll (as of a manuscript), coil, wreath, from volvere to turn around, roll (see volvox). Meaning book forming part of a set (1520s) is from a sense in French.