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cis-

   Also found in: Medical, Acronyms, Encyclopedia, Wikipedia 0.01 sec.
cis-
pref.
1. On this side: cisatlantic.
2. Having a pair of identical atoms or groups on the same side of a plane that passes through two carbon atoms linked by a double bond. Used of a geometric isomer: cis-2-butene.
[Latin, from cis, on this side of; see ko- in Indo-European roots.]
cis-
prefix
1. (Earth Sciences / Physical Geography) on this or the near side of cisalpine
2. (Chemistry) (often in italics) indicating that two groups of atoms in an unsaturated compound lie on the same side of a double bond cis-butadiene Compare trans- [5]
[from Latin]
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