English Dictionary

cis-

/sɪs/

prefix

(geography) On this side of. / (chemistry) Forming names of chemical compounds in which two atoms or groups are situated on the same side of some plane of symmetry passing through the compound.

Cisalpine Gaul was a region on this side of the Alps.

意味（1）

(geography) On this side of.

cis- + alpine → cisalpine (“on this [the Roman] side of the Alps”)

意味（2）

(chemistry) Forming names of chemical compounds in which two atoms or groups are situated on the same side of some plane of symmetry passing through the compound.

Microbial degradation products of tetrachloroethylene in groundwater have been reported to include primarily trichloroethylene and small amounts of cis- and trans-dichloroethylene.

意味（3）

(gender) Being, or pertaining to being, cis; cisgender or cissexual.

cis- + gender → cisgender