Category: U

  • Unfounded

    Without a sound basis in fact.  

  • Undulant fever

    Brucellosis.  

  • Undifferentiated sex typing

    Showing how acceptance for behaviors stereotyped as appropriate for either sex.  

  • Undescended testicle

    Failure of a testicle to descend into the scrotum. A condition in which one or both testicles fail to drop from inside the abdomen into the scrotum before birth; also called cryptorchidism. Failure of one or both testicles to descend into the scrotum (the protective pouch that hangs behind the penis) before birth. Known as…

  • Underweight

    A deficiency of more than 10% under one’s desirable weight. Weighing less than is medically advisable. Being 10 to 15 percent below the standard weight for one’s height. Body weight for height that is 15% to 20% below healthy weight; a body mass index below 19. By this standard, which is the one promoted both…

  • Understeer

    A term describing the handling characteristics of a vehicle that has the center of gravity located forward of the center of the vehicle making steering more difficult.  

  • Undernutrition

    A condition resulting from insufficient food.  

  • Underlying structure

    The phrase organization that describes the meaning of parts of a sentence, phrase structure, surface structure.  

  • Underextension

    A child’s tendency to limit the meaning of words to fewer referents than would an adult.  

  • Undercontrolled

    In reference to childhood disorders, problem behavior that creates trouble for others, e.g., disobedience and aggressiveness.