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| the letter used as the symbol for the ratio of the circumference of a circle to its diameter, or the ratio itself: 3.141592+ |
| the property of magnitude involving comparability with other magnitudes, size, volume, area, or length |
| aleph-null or aleph-zero | |
| —n | |
| א0 the smallest infinite cardinal number; the cardinal number of the set of positive integers | |
| aleph-zero or aleph-zero | |
| —n | |
| aleph-null (ä'lěf-nŭl') Pronunciation Key
The first of the transfinite cardinal numbers, corresponding to the number of elements in the set of positive integers. |