Main definitions of cis in English

: cis1cis2

cis1

adjective

Chemistry
  • Denoting or relating to a molecular structure in which two particular atoms or groups lie on the same side of a given plane in the molecule, in particular denoting an isomer in which substituents at opposite ends of a carbon–carbon double bond are on the same side of the bond.

    ‘the cis isomer of stilbene’
    Compare with trans
    • ‘Greater reductions occur when cis double bonds are located near the middle of the acyl chains.’
    • ‘As in our system, here again the cis isomer remains photoactive.’
    • ‘But ultraviolet light converts the molecule to the cis isomer, in which both propellers are on the same side.’
    • ‘Examples of stereoisomers include the cis and trans isomers of the alkenes.’
    • ‘For example, the cis double bond at the centre of the fatty chain in erucamide and oleamide appears vital for slip performance.’

Origin

Independent usage of cis-.

Pronunciation:

cis

/sis/

Main definitions of cis in English

: cis1cis2

cis2

adjective

  • ‘we do not make arbitrary distinctions between trans and cis women’
    short for cisgender
    • ‘I wasn't trying to set up a competition or hierarchy between trans and cis people.’
    • ‘They're also implicitly acknowledging that gender is never fixed, it is never a constant for anyone, cis or trans.’
    • ‘It's been really amazing to see the response from our cis allies against transphobia from parts of the radical feminist community.’
    • ‘Cooper's take on masculinity is that all of us—male or female, trans or cis—take it for granted, fail to question it, and thus are "complicit" with it.’
    • ‘Trans people tend to be more aware of transphobia than most cis people are.’
    • ‘To witness black cis women and trans women support one another is indeed a radical representation of the possibilities of black solidarity.’

Pronunciation:

cis

/sis/

Main definitions of cis in English

: cis1cis2

CIS

  • Commonwealth of Independent States.

Pronunciation:

CIS

/sis/