See under .
[yoo-jen-iks] /yuˈdʒɛn ɪks/
noun, (used with a singular verb)
the study of or belief in the possibility of improving the qualities of the human species or a human population, especially by such means as discouraging reproduction by persons having genetic defects or presumed to have inheritable undesirable traits (negative eugenics) or encouraging reproduction by persons presumed to have inheritable desirable traits (positive eugenics)
(functioning as sing) the study of methods of improving the quality of the human race, esp by selective breeding
1883, coined (along with adjective eugenic) by English scientist Francis Galton (1822-1911) on analogy of ethics, physics, etc. from Greek eugenes “well-born, of good stock, of noble race,” from eu- “good” (see eu-) + genos “birth” (see genus).
The investigation of human eugenics, that is, of the conditions under which men of a high type are produced. [Galton, “Human Faculty,” 1883]
eugenics eu·gen·ics (yōō-jěn’ĭks)
The study of hereditary improvement of the human race by controlled selective breeding.
The idea that one can improve the human race by careful selection of those who mate and produce offspring.
Note: Eugenics was a popular theory in the early twentieth century but is no longer taken seriously, primarily because of the horrors of the eugenic efforts of the Nazi regime in Germany.
noun, Electronics. 1. See under (def 1). [feed-bak] /ˈfidˌbæk/ noun 1. Electronics. 2. the furnishing of data concerning the operation or output of a machine to an automatic control device or to the machine itself, so that subsequent or ongoing operations of the machine can be altered or corrected. 3. a reaction or response to […]
noun 1. the letter N in the International Code of Signals, signifying “no” when flown by itself: a square flag having four rows of alternate blue and white squares.
noun, Physics. 1. the luminous region between the Crookes dark space and the Faraday dark space in a vacuum tube, occurring when the pressure is low.
- Negative hallucination
noun 1. (psychol) an apparent abnormal inability to perceive an object