e/Ackermann ordinal

Information
has gloss	eng: In mathematics, the Ackermann ordinal is a certain large countable ordinal, named after Wilhelm Ackermann. The term "Ackermann ordinal" is also occasionally used for the small Veblen ordinal, a somewhat larger ordinal.
lexicalization	eng: Ackermann ordinal
instance of	(noun) the number designating place in an ordered sequence ordinal number, no., ordinal