Designating a mode lying a perfect fourth below the authentic form.
Designating a cadence in which the subdominant chord precedes the tonic.
Origin: From plagalis, from plaga, from plagius, from Byzantine Greek ‘plagal’, ‘oblique’.
having a scale running from the dominant to its octave; -- said of certain old church modes or tunes, as opposed to those called authentic, which ran from the tonic to its octave
Origin: [F., from Gr. pla`gios sidewise, slanting.]
Chambers 20th Century Dictionary
plā′gal, adj. in Gregorian music, denoting a mode or melody in which the final is in the middle of the compass instead of at the bottom—opp. to Authentic. [Gr. plagios, sidewise—plagos, a side.]
The numerical value of plagal in Chaldean Numerology is: 1
The numerical value of plagal in Pythagorean Numerology is: 4
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