retrograde wave

retrograde wave

[′re·trə‚grād ′wāv]
(meteorology)
An atmospheric wave which moves in a direction opposite to that of the flow in which the wave is embedded; retrogression of a particular wave on daily charts is rarely seen, but is frequently observed on 4-day or monthly mean charts.
References in periodicals archive ?
The Doppler spectrum obtained from normal subjects, therefore is multiphasic, two large antegrade diastolic and systolic waves and a small retrograde wave corresponding to atrial systole.
For example, size and speed might be correlated in species that crawl using retrograde waves, but not in species using arrhythmic waves.