Diaper is a damask cloth with small geometrical patterns such as bird's eye or diamond shapes. Terms such as “bird’s eye” or “pheasant’s eye” refer to the size of the diamond in the design.^[1] Diaper has been used as a tablecloth.^[2]

Bird's eye pattern (nightingale's eye, bulbul chashm) is a geometrical pattern of a diamond shape similar to a bird's eye used in various types of cloth.^[3] Bulbul chashm ("chashm-e-bulbul") or nightingale's eye refers to a larger diamond shape with a dotted eye in the middle. ^{[4][5][6][7][8][9][10][11]}

The etymology of the term "diaper" traces back to the Latin word "diasper," which denotes rough and uneven texture. The word passed through the Low Latin term "diasperus," which referred to a particular type of cloth.^[12]

“Diaper” refers to any small geometrical or floral pattern that consists of the constant repetition of one or more simple figure or units of design evenly spaced. The term was initially associated with silk with diamond patterns later applied to linen and cotton fabrics of similar designs.^[13][14][15]

Diaper is made of linen and sometimes cotton or a combination of both.^[13][16]

• A diaper weave, that is a weave creating a diamond pattern in the cloth. Such cloth is quite absorbent and was therefore used for babies' nappies, also called diapers
• A similar weave, also called a diamond twill

The design's versatility in terms of textile materials received praise, and several other applications associated with the bird's eye pattern are worth mentioning. These include:

• Diapering is any of a wide range of decorative patterns used in a variety of works of art, such as stained glass, heraldic shields, architecture, and silverwork. Its chief use is in the enlivening of plain surfaces.