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  2. Genus (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Genus_(mathematics)

    The non-orientable genus, demigenus, or Euler genus of a connected, non-orientable closed surface is a positive integer representing the number of cross-caps attached to a sphere. Alternatively, it can be defined for a closed surface in terms of the Euler characteristic χ, via the relationship χ = 2 − k , where k is the non-orientable genus.

  3. List of age-related terms with negative connotations - Wikipedia

    en.wikipedia.org/wiki/List_of_age-related_terms...

    Baby: Term often used to tease others for being childish or too young, or for behaving in an immature way. Bag lady: A homeless old woman or vagrant. Barely legal: [6] A term used to market pornography featuring young people who are "barely legal" (only just reached legal age of majority or the age of consent, or both). The term fetishizes ...

  4. Genus g surface - Wikipedia

    en.wikipedia.org/wiki/Genus_g_surface

    The genus (sometimes called the demigenus or Euler genus) of a connected non-orientable closed surface is a positive integer representing the number of cross-caps attached to a sphere. Alternatively, it can be defined for a closed surface in terms of the Euler characteristic χ, via the relationship χ = 2 − g, where g is the non-orientable ...

  5. 20 iconic slang words from Black Twitter that shaped pop culture

    www.aol.com/20-iconic-slang-words-black...

    In honor of Black Twitter's contribution, Stacker compiled a list of 20 slang words it brought to popularity, using the AAVE Glossary, Urban Dictionary, Know Your Meme, and other internet ...

  6. Glossary of Generation Z slang - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_Generation_Z_slang

    Term used to highlight or bring attention to one's outfit. "Fit" is a truncation of "outfit". [56] finna Short for "fixing to". The term has its roots in Southern American English, where "fixing to" has been used to mean "getting ready to" since the 18th century. [57] flop Opposite of "bop." [citation needed]

  7. Glossary of early twentieth century slang in the United States

    en.wikipedia.org/wiki/Glossary_of_early...

    While slang is usually inappropriate for formal settings, this assortment includes well-known expressions from that time, with some still in use today, e.g., blind date, cutie-pie, freebie, and take the ball and run. [2] These items were gathered from published sources documenting 1920s slang, including books, PDFs, and websites.

  8. If and only if - Wikipedia

    en.wikipedia.org/wiki/If_and_only_if

    The corresponding logical symbols are "", "", [6] and , [10] and sometimes "iff".These are usually treated as equivalent. However, some texts of mathematical logic (particularly those on first-order logic, rather than propositional logic) make a distinction between these, in which the first, ↔, is used as a symbol in logic formulas, while ⇔ is used in reasoning about those logic formulas ...

  9. Urban Dictionary - Wikipedia

    en.wikipedia.org/wiki/Urban_Dictionary

    Urban Dictionary Screenshot Screenshot of Urban Dictionary front page (2018) Type of site Dictionary Available in English Owner Aaron Peckham Created by Aaron Peckham URL urbandictionary.com Launched December 9, 1999 ; 25 years ago (1999-12-09) Current status Active Urban Dictionary is a crowdsourced English-language online dictionary for slang words and phrases. The website was founded in ...