Cis

  • In the news

  • Stingers upset top-ranked Huskies 29-10 in CIS football action
    Canada.com, Canada -
    ... Elsewhere in CIS football, it was: York 45, Toronto 41; Bishop's 25, Mount Allison 13; Montreal 56, StFX 15; Laval 21, Acadia 18; Western 46, Windsor 14 ...
  • CIS to send 600 to monitor Ukrainian ballot
    Interfax, Ukraine -
    Anatoliy Holovaty, deputy head of CIS executive committee, told a press conference Monday that Ukraine had asked all of CIS member-countries to send their ...
  • Grid Bears ... big men on campus now
    Edmonton Sun, Canada -
    ... final. But few figured the Bears would be ready to assume the mantle of the top school in CIS football - certainly not this fast. ...
  • Rangers in the CIS Cup
    eleven-a-side.com, Ireland -
    Celtic will face rivals Rangers in the fourth round of the CIS Cup next month after the draw was made over the weekend. The Hoops ...
  • Alberta top CIS football rankings
    TSN.ca, Canada -
    OTTAWA (CIS) - With upsets coming to the top two ranked teams in Canada, a major reshuffling of the national rankings took place this week in Canadian ...
cis is a Latin word meaning "on the same side" and is the opposite of trans. See Ciskei and Transkei, also Cisalpine Gaul and Transalpine Gaul.


In chemistry, a double bond in which the greater radical on both ends is on the same side of the bond is called cis. Compare with trans.
image:cis_bond.png

In the example shown on the right, both hydrogen molecules, (and both fluorine molecules) are on the same side of the carbon chain. As the carbons are joined by a double bond, these cannot rotate around the molecule.

See Geometric isomerism for more on this.


In genetics, cis- is a prefix used in terms such as "cis-regulation" to signify the co-location of two or more genes on the same chromosome of a homologous pair.


In mathematics, eix = cos x + i sin x (see Euler's formula). Cis is a now seldom used abbreviation for "cosine plus i sine" (of x). Usually eix or exp(ix) is best used.


Unrelated to the above, CIS is an acronym for Commonwealth of Independent States.