Category: E

The science that is concerned with the betterment of living conditions to establish more efficient human beings. The science of improvement of a population through modification of the environment.  

The process of bringing about the painless death of a person. The act or practice of killing individuals (active) or allowing them to die without giving all possible treatment for their disease (passive), because they are hopelessly sick or injured, for reasons of mercy. The painless killing of an incurably ill person or someone in…

A tension appropriate for preparing the body for maximum functioning. A type of stress that results in positive change or growth. Eustress refers to happy or pleasant events under which health and performance improve even as stress increases.  

The air tube extending from the middle ear to the throat that maintains the pressure equilibrium on the eardrum and drains the middle ear. The tube which connects the pharynx to the middle ear. Mucous-membrane-lined tube that connects the nasopharynx and the middle ear; it allows pressure in the inner ear to be equalized with…

A castrated male or one who is similar in appearance to a eunuch. Having the characteristics of a eunuch, such as retarded development of sex organs, absence of beard and bodily hair, high-pitched voice, and striking lack of muscular development.  

A castrated male. Male whose testes have been removed; a eunuch shows signs of lack of male hormone (testosterone), such as feminine voice and lack of facial hair. A man whose testes have been removed or seriously damaged so that he is unable to produce male hormones and thus is sterile. A male castrated before…

A composition or speech that praises someone who has died. Usually delivered at a funeral or memorial service.  

Organisms showing mitosis with membrane-bound nuclei and other organelles.  

Parts of chromosomes that are genetically active and have characteristic staining properties, heterochromatin. Chromosome material that stains most deeply during mitosis and represents the major genes. Unfolded or uncondensed portions of chromosomes during interphase. Transcription of DNA by messenger RNA occurs, and proteins are synthesized.  

True bacteria with rigid cell walls. A very large group of bacteria with rigid cell walls and (typically) flagella for movement. The group comprises the so called true bacteria, excluding those, such as spirochetes and mycoplasmas, with flexible cell walls. A group of single-celled organisms without a defined cell nucleus or organelles. They contain peptidoglycans…