Category: N

A view of the skull as seen from the side; a profile view.  

The outline of the skull viewed from the front.  

An estrogen/progestin used as a tricyclic contraceptive hormone. It is administered orally to healthy women and girls over 14 years of age to prevent pregnancy, regulate the menstrual cycle, and manage acne if topical treatment has failed.  

A standardized preparation of norepinephrine. The former name was levarterenol bitartrate.  

Any of several standard psychometric tests that measure intelligence without the confounding effect posed by differences in speech, reading, and language ability. Such tests include visuospatial tests, pattern recognition tests, and picture-completion tests.  

Not poisonous or productive of poison. A list of substances considered generally nontoxic is provided in the Appendix. Failure to unite, as a fractured bone that fails to heal completely. Diagnosis of nonunion is established when a minimum of 9 months has elapsed since the injury and the fracture site shows no progressive signs of…

A radiation effect whose severity increases in direct proportion to the dose and for which there usually is a threshold. An example is radiation-induced cataracts.  

The use of injections of foreign proteins or bacterial vaccines in the treatment of infection to stimulate general immunological responses.  

Inexact, imprecise, not well delimited or defined.  

Treatment of the uncooperative without using mechanical restraints.