Small circumscribed changes in the color of skin that are neither raised (elevated) nor depressed. Macules are never large. They are basically little spots or blemishes in the skin. They are entirely flat and can only be appreciated by visual inspection; they cannot be seen from the side.
Dermatologists call small flat skin spots on the skin macules, as opposed to papules which are small solid bumps that rise up above the surrounding skin and vesicles which are small blisters that contain fluid (before they burst).
The word macule comes from the Latin macula meaning a small spot or blemish.
Note — The macula lutea (yellow spot), or simply as the macula, is a spot in the retina (where vision is keenest).
Any pathologic condition or disease of the macula, the small spot in the retina where vision is keenest. Also called macular retinopathy.
- Mad deer disease
See Chronic wasting disease.
- Magendie, foramen of
An opening from the fourth ventricle in the brain to the central canal of the upper end of the spinal cord.
A soft-bodied wormlike larva of a fly that lays its eggs in living or especially in decaying tissues. The living or rotting material furnishes heat for the hatching of the eggs and food for the newly hatched maggots. Certain blowfly maggots — notably, those of the blackbottle fly (Phormia regina) and the greenbottle fly (Phaenicia […]
- Magic bullet
Or, sometimes, silver bullet. 1. The perfect drug to cure a disease with no danger of side effects. The term magic bullet was first used in this sense by the German scientist Paul Ehrlich to describe antibody and, later, the drug salvarsan that he created to treat syphilis. 2. In general, a magical solution to […]