zorns-lemma

Zorn's lemma

[zawrnz]
noun Mathematics.
a theorem of set theory that if every totally ordered subset of a nonempty partially ordered set has an upper bound, then there is an element in the set such that the set contains no element greater than the specified given element.

Origin:
1945–50; after Max August Zorn (born 1906), German mathematician

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Zorns-lemma is always a great word to know.
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a chattering or flighty, light-headed person.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
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