First Known Use: 1888
Dictionary
cis
adjective \ˈsis\
Definition of CIS
: characterized by having certain atoms or groups of atoms on the same side of the longitudinal axis of a double bond or of the plane of a ring in a molecule
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Origin of CIS
Latin, literally, on this side
CIS
abbreviation
Definition of CIS
Commonwealth of Independent States
Medical Dictionary
cis
adjective \ˈsis\
Medical Definition of CIS
1
: characterized by having certain atoms or groups of atoms on the same side of the longitudinal axis of a double bond or of the plane of a ring in a molecule
2
: relating to or being an arrangement of two very closely linked genes in the heterozygous condition in which both mutant alleles are on one chromosome and both wild-type alleles are on the homologous chromosome—compare trans 2
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