Category: O

A carbon-containing compound. There are four classes of major nutrients: (a) carbohydrates, (b) proteins, (c) lipids, and (d) vitamins. A compound containing carbon. Such compounds include carbohydrates, proteins, and fats.  

A substance, such as an acid, alkali, salt, or synthetic compound obtained by a chemical process, prepared for use in chemical manufacture, or used for producing a chemical effect, inorganic chemical.  

A disorder characterized by mental confusion, disorientation, and decreased intellectual function. Possibly caused by the prolonged use of psychoactive drugs. Any of a large group of acute and chronic mental disorders associated with brain damage or impaired cerebral function. A cognitive, intellectual, or mental dysfunction that stems from physical, rather than psychiatric, origins is known…

A person who donates one or more of his or her organs to another person whose organ is diseased, injured, or lacking.  

In epidemiology, a variable having values that can be meaningfully ordered or ranked.  

A scale in which responses are ranked ordered by relative magnitude but in which the intervals between successive ranks are not necessarily equal, categorical scale; interval scale; ratio scale.  

A dental specialty concerned with surgery of the oral cavity such as dental extractions and related structures. A branch of dentistry that involves the diagnosis and surgical treatment of disorders of the teeth, mouth, and jaws. The removal of teeth is an important part of the practice of oral surgery. An oral and maxillofacial surgeon…

A dentist specializing in surgery of the mouth or oral cavity. A dental-medical professional who specializes in performing surgery on the mouth, face, teeth, or jaw. An oral surgeon must be a trained dentist with an additional specialty in oral and maxillofacial (upper face) surgery and is often trained as a physician as well. Oral…

In Freudian psychology, the first of four psychosexual stages in which sexual pleasure is derived through stimulation of the lips and mouth and extends from birth to age two anal stage; genital stage; latency period.  

Fellatio or cunnilingus. Sexual stimulation of the genitals by a sex partner’s mouth and tongue. Cunnilingus is oral stimulation of the female genitals; fellatio is oral stimulation of the penis. Certain sexually transmitted diseases (such as chlamydia, herpes simplex, genital warts, syphilis, gonorrhea, and HIV) can be transmitted through oral sex.