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S vs Directrix - What's the difference?

s | directrix |

As a letter s

is the letter s with a.

As a noun directrix is

a female who directs; a directress.

s

Translingual

{{Basic Latin character info, previous=r, next=t, image= (wikipedia s)

Letter

  • The nineteenth letter of the .

    • Symbol

    (wikipedia) (mul-symbol)
  • voiceless alveolar fricative
  • Symbol for second , an SI unit of measurement of time.

    • See also

    (Latn-script) * * (esh) * (dze) * {{Letter , page=S , NATO=Sierra , Morse=ยทยทยท , Character=S , Braille=? }} Image:Latin S.png, Capital and lowercase versions of S , in normal and italic type Image:Fraktur letter S.png, Uppercase and lowercase S in Fraktur Symbols for SI units ----

    directrix

    English

    (wikipedia directrix)

    Noun

    (directrices)
  • A female who directs; a directress.
  • (geometry) A line used to define a curve or surface; especially a line, the distance from which a point on a conic has a constant ratio to that from the focus.

    • Derived terms

    * conic section directrix * graph directrix * ruled surface directrix