Top definition. Musk. Though technically the name for the secretion of the male musk deer, musk is most often used as the name for the scent of arousal in both men and women, as actual musk is used in perfumes and colognes. Generally causes arousal for both genders, as it is a secondary sex characteristic.
These photoreceptors are called the rods and cones. Rods are called rods because under the microscope, they are shaped like, of all things, a rod. Finally, those pesky scientists named a structure for what it actually looks like as opposed to someone's unpronounceable last name!
Rods and cones of the human eye. You can see in the drawing on the left that the back of the eye is lined with a thin layer called the retina. This is where the photoreceptors are located. If you think of the eye as a camera, the retina would be the film.The retina also contains the nerves that tell the brain what the photoreceptors are seeing.. There are two types of photoreceptors involved in sight: rods and cones.Rods work at very low levels of light.ods and Cones. show/hide words to know. 1  Cornea: is the clear outer surface of the eye the covers the iris, pupil, and the outer chamber of the eye... 2  more. 3  Epithelium: the layer of cells found lining the surface of most surfaces of the body.