What does "cis" mean?
Initialism of contact image sensor.
adj, name, noun ·Moderate ·College level
This entry combines structured lexical data with WordToolSet review checks. Definitions, examples, synonyms, and usage notes may come from different source tables, so the page is designed to show evidence from more than one angle before you rely on "cis" in a final draft.
If a word has several senses, prefer the sense that matches your sentence's grammar and surrounding context. A correct definition can still be the wrong choice when the sentence needs a different register, emphasis, or level of specificity.
Read the first definition as a starting point, then check the example, synonyms, and part of speech before treating "cis" as the right word for your sentence.
If your draft is formal, technical, persuasive, or sensitive, compare "cis" with a nearby alternative so the final choice matches both meaning and reader expectation.
Check whether "cis" is acting as adj, name, noun in your sentence. A definition is only useful when the grammar matches the way the word is being used.
Compare it with "cis isomer" and other nearby choices to see whether the sentence needs a softer, stronger, or more familiar word.
Use the example sentence below as an evidence check, then read your own sentence out loud to catch tone or rhythm problems.
Review note: Definition pages are checked for source coverage, sentence evidence, synonym support, and editorial insight before they are treated as approval-ready pages. If the evidence is too thin, the page remains available to users but is kept out of the approval-facing indexed inventory.
Before publishing a sentence with "cis", ask whether the word helps the reader understand the idea faster. A precise word should reduce confusion, not simply make the sentence look more polished.
When the definition, synonym evidence, and example context point in the same direction, the word is usually a safer choice. When they conflict, revise the sentence or choose a clearer alternative.
"Because of its tabloid-size scanbed, the Plug-n-Scan has a large footprint that makes it very stable. On the other hand, being a CIS scanner, it's light and has a very low profile and is designed so that the scanner can be stood upright on its end and still function."
"We're demonized and criminalized as perverts out to trick and deceive cis hetero men; therefore anything that happens to us, we 'had coming.'"
"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 […]"
"The cis effect is the labilization of ligands which are cis to certain other ligands."
"Bensman joins Jon Feere, another CIS alumnus who rejoined the Trump administration as ICE’s chief of staff. CIS Executive Director Mark Krikorian reposted DHS’ “Which Way, American Man” ad on X."
"85% of foreign investors working in Kazakhstan consider it the most attractive market in the CIS."
Initialism of contact image sensor.
Common synonyms include: cis isomer, cis person, cisgender, cisgender person, commonwealth of independent states, same-side.
85% of foreign investors working in Kazakhstan consider it the most attractive market in the CIS.
Pronounced /sɪs/.
From Latin cis (“on this side (of), on the near or same side”). Doublet of he, it, here, hither, and hence.
Clipping of cisgender or cissexual, ultimately from Latin cis.
Initialisms.
Likely originates from the false etymology asserting that cis is an initialism standing for comfortable in skin.