Dictionary
a•leph-null
Pronunciation: (ä'lif-nul'), [key]—
n. Math.
the cardinal number of the set of all positive integers; the smallest transfinite cardinal number. Also called
a•leph-ze•ro Pronunciation: (ä'lif-zēr'ō). [key]Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.