A particular point in the time of a cycle; measured from some arbitrary zero and expressed as an angle WordNet 3.0 & Open English WordNet

In the context of phasors, phase angle refers to the angular component of the complex number representation of the function. Wikipedia

Phase angle may refer to: Phase, the angular displacement of a sinusoid from a reference point or time Phasor angle, angular component of the complex number representation of a sinusoid Analytic representation phase, instantaneous phase of an analytic signal representation Phase angle, the angle between the incident light and reflected light. Wikipedia

angular measure of the phase of a complex number Wikidata

Angular component of the vector representation of a sinusoid. Wiktionary