the GNU version of the Collaborative International Dictionary of English
adj. The Roman numerals signifying nine; denoting a quantity consisting of one more than eight and one less than ten.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. denoting a quantity consisting of one more than eight and one less than ten
n. the cardinal number that is the sum of eight and one
Word Usage
"Page 53 connection cannot be assumed without separating x¹ a from x¹ b, with which, however, it obviously forms a group, and entirely disregarding the relations which the groups x, ix: ix¹, x¹ bear to one another and to the dolphin 0¹."