brussels carpet: a carpet with a strong linen warp and a heavy pile of colored woolen yarns drawn up in uncut loops to form a pattern
rug: floor covering consisting of a piece of thick heavy fabric (usually with nap or pile)
apoptosis: a type of cell death in which the cell uses specialized cellular machinery to kill itself; a cell suicide mechanism that enables metazoans to control cell number and eliminate cells that threaten the animal's survival