S: (adj) fourth, 4th, quaternary (coming next after the third and just before the fifth in position or time or degree or magnitude) "the quaternary period of geologic time extends from the end of the tertiary period to the present"
S: (adj) fifth, 5th (coming next after the fourth and just before the sixth in position)
S: (adj) sixth, 6th (coming next after the fifth and just before the seventh in position)
S: (adj) seventh, 7th (coming next after the sixth and just before the eighth in position)
S: (adj) eighth, 8th (coming next after the seventh and just before the ninth in position)
S: (adj) ninth, 9th (coming next after the eighth and just before the tenth in position)