singly-reported variant recitations (الْقِرَاءَاتُ الآحَاد)
علوم القرآن
التعريف :
What has a sound chain of transmission, but does not meet one of the conditions of tawātur [i.e. Multiple reporting], such as being at variance with the original written form, or Arabic grammar, or was not widely reported. These may not be recited.