phenotype

n. the observable characteristics of an individual, such as morphological or biochemical features and the presence or absence of a particular disease or condition. Phenotype is determined by the expression of the individual’s genotype coupled with the effects of environmental factors (e.g., nutritional status, climate). See also paratype. —phenotypic adj.

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Psychology term of the day

November 16th 2024

Doppler effect

the apparent increase or decrease in wavelength or frequency observed when a source of electromagnetic radiation or sound approaches or recedes from the observer or listener, producing a change in hue or pitch. The total Doppler effect may result from motion of the source, observer, or medium (such as a sound wave). [Christian Andreas Doppler (1803–1853), Austrian mathematician]