| crustecdysone | <endocrinology> A hormone, or biochemical substance produced by one part of the body to trigger an event elsewhere in the body, which causes molting (shedding of the exoskeleton) in crustaceans (such as crabs, lobster, shrimp, etc.), so that the crustacean can undergo a growth spurt before a new exoskeleton hardens. (09 Oct 1997) |
|---|---|
| crusted ringworm | 1. <dermatology> A disease of the scalp, produced by a vegetable parasite. 2. A tile or flagstone cut into an hexagonal shape to produce a honeycomb pattern, as in a pavement. Synonym: favas and sectila. Origin: L, honeycomb. Source: Websters Dictionary (01 Mar 1998) |
| crusted tetter | <dermatology, microbiology> A contagious pyoderma caused by direct inoculation of group A streptococci or Staphylococcus aureus into superficial cutaneous abrasions or compromised skin. It is most commonly seen in children, usually located on the face, especially about the nose and mouth. The characteristic features are the presence of discrete fragile vesicles surrounded by an erythematous border that become pustular and rupture to discharge a thin, amber coloured seropurulent fluid that dries and forms a thick yellowish crust, the pustules may spread peripherally with central healing, evolving into annular, circinate or gyrate patterns. (18 Nov 1997) |