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Acronyms that contain the term cis-trans 

What does cis-trans mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: cis-trans.

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TWA

Trans World Airlines

Business » Companies & Firms

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TEN

Trans European Network

Governmental » Transportation

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ATA

American Trans Air

Business » Companies & Firms

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TWR

Trans World Radio

Community » News & Media

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TWA

Trans World Airlines, Inc.

Business » AMEX Symbols

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TC

Trans Canada

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TC

Trans Canada

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PATH

Port Authority Trans Hudson

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TA

Trans American

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TETRA

Trans-European Trunked RAdio

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TG

Trans Gender

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TNO

Trans Neptunian Object

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TWEC

Trans World Entertainment Corporation

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TEA

Trans European Airways

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TLX

Trans Lux Corporation

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TIA

Trans International Airlines

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TUBA

Trans-Umbilical Breast Augmentation

Medical » Physiology

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TCT

Trans Continental Talent

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TMP

Trans Membrane Pressure

Medical » Physiology

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TGSI

Trans Global Services, Incorporated (de-listed)

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TAA

Trans Australia Airlines

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TAFF

Trans Atlantic Fan Fund

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HNE

4-Hydroxy-trans-2-NonEnal

Academic & Science » Chemistry

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TWI

Trans World International

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TLI

Trans Lunar Injection

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What does cis-trans mean?

cis-trans
Cis–trans isomerism, also known as geometric isomerism or configurational isomerism, is a term used in chemistry that concerns the spatial arrangement of atoms within molecules. The prefixes "cis" and "trans" are from Latin: "this side of" and "the other side of", respectively. In the context of chemistry, cis indicates that the functional groups (substituents) are on the same side of some plane, while trans conveys that they are on opposing (transverse) sides. Cis–trans isomers are stereoisomers, that is, pairs of molecules which have the same formula but whose functional groups are in different orientations in three-dimensional space. Cis-trans notation does not always correspond to E–Z isomerism, which is an absolute stereochemical description. In general, cis–trans stereoisomers contain double bonds that do not rotate, or they may contain ring structures, where the rotation of bonds is restricted or prevented. Cis and trans isomers occur both in organic molecules and in inorganic coordination complexes. Cis and trans descriptors are not used for cases of conformational isomerism where the two geometric forms easily interconvert, such as most open-chain single-bonded structures; instead, the terms "syn" and "anti" are used. The term "geometric isomerism" is considered by IUPAC to be an obsolete synonym of "cis–trans isomerism".

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