Vivisection is the practice of cutting into or using invasive techniques on live animals. The term is derived from the Latin word vivus, which means alive. Vivisection is commonly called animal experimentation and includes the use of animals for research, product testing and in education.evertheless, the National Institute of Health, which is funded by our tax dollars, has spent over $10 million on chimpanzee AIDS research and plans to spend at least an additional $4.5 million.
Definition of dimorphic. 1  1a : dimorphous 1b : occurring in two distinct forms dimorphic leaves sexually dimorphic coloration in birds. 2  2 : combining qualities of two kinds of individuals in one.
1. Dark, dim, obscure, gloomy, murky refer to absence or insufficiency of light. Dark implies a more or less complete absence of light: a dark night. Dim implies faintness of light or indistinctness of form (resulting from the lack of light or from imperfect vision): a dim outline. Obscure implies dimness that may arise also from factors that interfere with light or vision: obscure because of haze.