सिद्धान्तशिरोमणि: गणिताध्याय (भास्कराचार्य - ग्रहगणित, मध्यमाधिकार व स्पष्टाधिकार सटीक)

551 74. Rāhu : The point of intersection of the Moon's path with the ecliptic (ascending point of the Moon's path). Also it means the circular section of the earth's shadow at the Moon. 75. Rāśi : An arc equal to 30° (on the ecliptic). 76. Samabindu or : North point. Udagbindu 77. Samamaṇḍala : Prime vertical. 78. Sama-Śaṅku : The Hindu cosine of the altitude when the Sun is on the Prime Vertical. 79. Saṁkramaṇa : The point of time when the Sun enters from one Rāśi to another of the twelve Rāśis, Meṣa etc. measured from the zero- point of the Hindu Zodiac. 80. Śaṅku : Gnomon. 81. Śaṅku : The Hindu sine of the Altitude. (Also means) 82. Śaṅku-cchāyā : The shadow cast by the gnomon. 83. Saura-māsa : The time when the Sun occupies one Rāśi. 84. Śara : The Hindu versed-sine of the hour-angle. Also it means celestial latitude. 85. Sāvanāha : The time between two consecutive Sun-rises. 86. Sūtra : The Hindu sine of the complement of the hour-angle. 87. Taddhṛti : The Hṛti of a celestial body when it is on the prime vertical. 88. Tithi : The time taken by the elongation of the moon to increase by 12° starting from zero.

552 89. Tithi-kṣaya : Since a Tithi falls short of a Sāvanāha or civil day, in course of time, it so happens, that a tithi begins after sun-rise and does not last upto the next sun-rise. Such a tithi is said to be lost and goes by the name Tithi kṣaya. One such tithi kṣaya occurs out of 64 tithis approximately or eleven out of 703 more approximately. 90. Tretāyuga : Thrice the period of a Kaliyuga. 91. Trijyā : The Hindu sine of three Rasis or 90° equal to R or 3438 units. 92. Udaya : Rising or heliacal rising. 93. Unmaṇḍala or : The great circle through the celestial pole Udvṛtta and the east point. 94. Unmaṇḍala : The Hindu cosine of the altitude of a Śaṅku celestial body situated on the unmaṇḍala. 95. Upavṛtta : A small circle parallel to the prime vertical through a star or a planet. 96. Vighaṭi or Vināḍi: One sixtieth of a ghaṭī. 97. Vikṣepa or śara : Celestial latitude. or Viśikha 98. Viṣuvatbindu : Equinoctial point. 99. Viṣuvat-chāyā : The shadow cast by the gnomon when the Sun is at the point of intersection of the celestial equator and the meridian on an equinoctial day. 100. Viṣuvat-Vṛtta : Celestial equator. 101. Vṛtta or Maṇḍala: A circle.

553 102. Yāmyottara- : The Hindu sine of the Altitude of a saṁku or Celestial body situated on the meridian. Dinārdha-Śaṅku 103. Yāmyottaravṛtta : The meridian at a place. 104. Yaṣṭi : R² - Ayanavalanajā² Yaṣṭi has also another meaning namely the length of the perpendicular from a point on the diurnal circle on the plane parallel to the plane of the horizon through the point of intersection of the diurnal circle with the unmaṇḍala. 105. Yoga : The time which elapses when the sum of the longitudes of the Sun and the Moon to increase by 13¹⁄₃º starting from zero. 106. Yuti : Conjunction.