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cis-

Definition of cis- in English:

prefix

1On this side of; on the side nearer to the speaker: cisatlantic Often contrasted with trans- or ultra-.
1.1 historical On the side nearer to Rome: cisalpine
1.2(Of time) closer to the present: cis-Elizabethan
2 Chemistry (usually cis-) Denoting molecules with cis arrangements of substituents: cis-1,2-dichloroethene

Origin

from Latin cis 'on this side of'.

Definition of cis- in:

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