A thing or being, event or process, perceptible through senses; or a fact or occurrence thereof. / (by extension) A knowable thing or event (eg by inference, especially in science)

(sometimes proscribed) plural of phenomenon

A condition of the hands and feet becoming discoloured, typically white, red, and blue, caused by an altered blood flow brought about by cold, or stress.

Synonym of qwerty syndrome

The tendency for skin lesions to appear on lines of trauma.

The worsening of neurological symptoms in multiple sclerosis and similar conditions when the body becomes overheated.

Ferranti effect

(mathematics) A behaviour of the Fourier series approximation at a jump discontinuity of a piecewise continuously differentiable periodic function, such that partial sums exhibit an oscillation peak adjacent the discontinuity that may overshoot the function maximum (or minimum) itself and does not disappear as more terms are calculated, but rather approaches a finite limit.

(mathematics) A problem of oscillation at the edges of an interval that occurs when using polynomial interpolation with polynomials of high degree over a set of equispaced interpolation points.

The optical illusion whereby viewing a series of still images in rapid succession gives the impression of continuous motion.