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  1. anhnha's Avatar
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    #1

    pronunciation of partial derivative symbol

    I am wondering how the professor pronounced the partial derivative symbol ∂ in the video (at 36:37). Is it doh, del or der?

  2. teechar's Avatar
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    #2

    Re: pronunciation of partial derivative symbol

    Quote Originally Posted by anhnha View Post
    doh
    To me, it sounds closest to that one.

  3. Editor, UsingEnglish.com
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    #3

    Re: pronunciation of partial derivative symbol

    Me too.

  4. anhnha's Avatar
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    #4

    Re: pronunciation of partial derivative symbol

    Thanks. Is "doh" the correct pronunciation of that symbol?

  5. teechar's Avatar
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    #5

    Re: pronunciation of partial derivative symbol

    It was pronounced "delta" when I went to university.

  6. Barb_D's Avatar
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    #6

    Re: pronunciation of partial derivative symbol

    My research showed only that it's called "the curved d" or sometimes "the curly d."

    It is not the lower case delta (the Greek letter).
    I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.

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    #7

    Re: pronunciation of partial derivative symbol

    Delta is the name of the Greek letter used in mathematics to represent "the change in". The partial derivative symbol is an invented symbol which, according to this Wikipedia article, is variously pronounced "del", "dee", "partial dee", "partial", "curly dee", or "dabba". The professor in the video pronounces it yet another way, doh.
    I am not a teacher.

  8. Skrej's Avatar
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    #8

    Re: pronunciation of partial derivative symbol

    The lower-case form of delta can be written with that vertical leg either curving back to the left, or with a kind of sharp 's' curve to the right.

    I picked up the habit of curving my lower-case d's to the left when I took a biblical Greek class, because it was easier for me to distinguish my own written Greek from a lower-case sigma (σ). I still write my English d's this way, for absolutely no valid reason.

    You can see some examples of both delta shapes here.
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    #9

    Re: pronunciation of partial derivative symbol

    The partial derivative symbol is not a lower-case delta.
    I am not a teacher.

  10. Editor, UsingEnglish.com
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    #10

    Re: pronunciation of partial derivative symbol

    Here are the BrE pronunciations of mathematical and scientific symols, etc:
    http://www.uefap.com/speaking/symbols/symbols.htm

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