adj

• (biology) Having two mutations on two genes on the same chromosome of a homologous pair.
• (cytology) Of the side of the Golgi apparatus nearer to the endoplasmic reticulum.
• (physical chemistry) In (or constituting, forming, or describing) a double bond in which the greater radical on both ends is on the same side of the bond.
  "9 is thought to survive longer when the CH = CH bond is cis and to favour the formation of another cis double bond in a propagation reaction involving its displacement by monomer. 10, on the other hand, is more likely to yield a trans double bond […]"
• (physical chemistry) In (or constituting, forming, or describing) a coordination compound in which the two instances of a particular ligand are adjacent to each other.
  "The cis effect is the labilization of ligands which are cis to certain other ligands."

noun

• (medicine, software) Initialism of clinical information system.

name

• (UK, business) Initialism of Construction Industry Scheme.
• (Canada, sports, historical) Initialism of Canadian Interuniversity Sport.
• (Philippines, motor racing) Initialism of Clark International Speedway.

adj

• (proscribed) Alternative letter-case form of cis (“cisgender”).