Surya Siddhanta
*वक्रातिवक्रा विकला मन्दा मन्दतरा समा । (C वक्रानुवक्रा) तथा शीघ्रतरा शीघ्रा ग्रहाणाम् अष्टधा गतिः॥
(And therefore) the motion of the planets is of eight kinds, i. e. I. Vakrá (decreasing retrograde motion). II. Ativakrá (increasing retrograde motion). III. Vikalá (stationary). IV. Mandá (increasing direct motion less than the mean motion). V. Mandatará (decreasing direct motion less than the mean motion). VI. Samá (mean motion). VII. Śíghratara or Atiśíghrá (increasing direct motion greater than the mean motion). VIII. Śíghrá (decreasing direct motion greater than the mean motion).
english translation
*vakrAtivakrA vikalA mandA mandatarA samA । (C vakrAnuvakrA) tathA zIghratarA zIghrA grahANAm aSTadhA gatiH॥
hk transliteration by Sanscript