aleph
Word family
- aleph-nullnounC2
Synonym discussion
Sense: noun/1
Aleph refers specifically to the first letter of the Hebrew alphabet, whereas 'letter' is a general term for any character in any writing system. 'Alphabet' is the whole set of letters in a language, not a single letter. The term 'aleph-null' (ℵ₀) is a specialised mathematical extension used in set theory to denote the smallest infinite cardinal number; it borrows its name from the Hebrew letter because Cantor, the mathematician, chose the symbol for its first-and-smallest connotation. In everyday English, only 'aleph' and 'letter' are common. For example: 'The Hebrew letter aleph looks different from the English letter A.'
Common collocations
Nouns
- aleph-null
- aleph numbers
Phrases
- the letter aleph
- begins with aleph
Etymology
Aleph comes from Hebrew 'אָלֶף (álef), the name of the first letter of the Hebrew alphabet. The letter originally developed from a Proto-Sinaitic pictograph of an ox's head, and the name 'aleph' is related to the Hebrew word for 'ox' or 'cattle'. The symbol was passed through the Phoenician alphabet before becoming the Hebrew letter we know today.
First known use
14th century
14th century, in the meaning defined above