Club drug: A drug such as MDMA (Ecstasy), GHB, Rohypnol, ketamine, methamphetamine, and LSD that is used by young adults at all-night dance parties such as “raves” or “trances,” dance clubs, and bars.
Use of club drugs can cause serious health problems and, in some cases, death. No club drug is benign. Chronic abuse of MDMA, for example, appears to produce long-term damage to serotonin-containing neurons in the brain. Because some club drugs are colorless, tasteless, and odorless, they can be added unobtrusively to beverages by individuals who want to intoxicate or sedate others. In recent years, there has been an increase in reports of club drugs used to commit sexual assaults.
Clubfoot: A common malformation of the foot that is evident at birth. The foot is turned in sharply so that the person seems to be walking on his or her ankle. Clubfoot can sometimes be corrected with a combination of surgery, bracing, and physical therapy. Also known as talipes equinovarus.
Cluster: In epidemiology, an aggregation of cases of a disease or another health-related condition, such as a cancer or birth defect, closely grouped in time and place. The number of cases in the cluster may or may not exceed the expected number. This is determined by cluster analysis, a set of statistical methods used to […]
- Cluster headache
A distinctive episodic syndrome of headaches. The most common cluster headache pattern, acute cluster headache, is characterized by one to three short attacks of pain each day around the eyes, clustered over a stretch of 1 to 2 months, and followed by a pain-free period that averages 1 year. The other main pattern of cluster […]
Cigar: A small roll of tobacco leaf for smoking. The word “cigar,” from the Spanish “cigarro,” first appeared in English in 1730. In 1998, a National Cancer Institute report outlined cause-and-effect connections between cigar smoking and disease, including cancer of the mouth and lungs, heart disease and emphysema, and stressed the danger of secondhand cigar […]
CIC: Completely-in-the-canal (the ear canal). See: Completely-in-the-canal hearing aid. See also: Hearing aid.