When someone becomes excited, their pupils can dilate to up to four times their original size. Conversely, an angry, negative mood causes the pupils to contract to what are commonly known as 'beady little eyes' or 'snake eyes'. Lighter eyes can look more attractive because it's easier to see the dilation taking place.
The term papilla (plural: papillae) generally means a nipple-like structure, and may refer to: Mammary papilla, or nipple. Amphibian papilla and basal papilla, part of the inner ear of the frog. Interdental papilla, part of the gingiva between teeth.
papillary. pertaining to a papilla; having the characteristics of a papilla. papillary duct. urine passes from the collecting tubules into the papillary ducts as the last section of the renal tubular system. papillary necrosis. necrosis of the renal papilla. See also infectious pancreatic necrosis of fish. papillary squirting. a feature of seborrheic dermatitis, zinc-responsive dermatoses; the superficial papillae are edematous and contain dilated vessels, the overlying epidermis is edematous and parakeratototic. papillary sulcus. gustatory glands open into a sulcus in the mouth.