aleph-null
[ ah-lif-nuhl ]
/ ˈɑ lɪfˈnʌl /
noun Mathematics.
the cardinal number of the set of all positive integers; the smallest transfinite cardinal number.
Also called
a·leph-ze·ro
[ah-lif-zeer-oh] /ˈɑ lɪfˈzɪər oʊ/.
Origin of aleph-null
First recorded in 1905–10
Words nearby aleph-null
alene,
alençon,
alençon lace,
aleph,
aleph-bet,
aleph-null,
aleppo,
aleppo boil,
aleppo gall,
aleppo pine,
alerce
British Dictionary definitions for aleph-null
aleph-null
aleph-zero
noun
the smallest infinite cardinal number; the cardinal number of the set of positive integers
Symbol: א 0
Scientific definitions for aleph-null
aleph-null
[ ä′lĕf-nŭl′ ]
The first of the transfinite cardinal numbers, corresponding to the number of elements in the set of positive integers.