| 441. | wavelength | the distance from the peak of one light or sound wave to the peak of the next. Electromagnetic wavelengths vary from the short blips of cosmic rays to the long pulses of radio transmission More… |
| 442. | Weber's Law | the principle that, to perceive their difference, two stimuli must differ by a constant minimum percentage (rather than a constant amount) |
| 443. | Wernicke's area | a brain area involved in language comprehension and expression; usually in the left temporal lobe |
| 444. | withdrawal | the discomfort and distress that follow discontinuing the use of an addictive drug |
| 445. | working memory | a similar concept that focuses more on the processing of briefly stored information |
| 446. | Young-Helmholtz trichromatic (three-color) theory | the theory that the retina contains three different color receptors--one most sensitive to red, one to green, and one to blue--which when stimulated in combination can produce the More… |
| 447. | zygote | the fertilized egg; it enters a 2-week period of rapid cell division and develops into an embryo. |
