Right-handed
The preferential use of the right hand for most fine manual tasks. Approximately 90% of the population is right-handed. In French, the word for right is droit and the word for left is gauche meaning clumsy or awkward. In Latin the word for right is dexter (as in dexterity) and the word for left is sinister, as left-handed persons were historically been seen as abnormal.
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- Rigor
1. A chill, usually with shivering, as at the onset of high fever and chills. 2. Rigidity, as in rigor mortis, the rigidity of a body after death. The alternate spelling rigour is chiefly British. From the French, from the Latin rigor, meaning stiffness, from rigere, to be stiff.
- Rigor mortis
Literally, the stiffness of death. The rigidity of a body after death. Rigor mortis is a good example of a Latin term (one in this case that was coined in the 19th century) remaining intact in contemporary medical usage (and crime writing). Rigor mortis is due to a biochemical change in the muscles that occurs […]
- Ring chromosome
A structurally abnormal chromosome in which the end of each chromosome arm has been lost and the broken arms have been reunited to form a ring. A ring chromosome is denoted by the symbol r.
- Ring vaccination
The vaccination of all susceptible individuals in a prescribed area around an outbreak of an infectious disease. Ring vaccination controls an outbreak by vaccinating and monitoring a ring of people around each infected individual. The idea is to form a buffer of immune individuals to prevent the spread of the disease. Ring vaccination was used […]
- Ring, intrastromal corneal
A plastic ring that is designed to be implanted in the cornea, the transparent structure at the front of the eye, to flatten the cornea and thereby reduce the degree of nearsightedness (myopia). The ring is placed in the corneal stroma, the middle of the five layers of the cornea.