Definition of "stereoisomer" []

• One of a set of isomers whose molecules have the same atoms bonded to each other but differ in the way these atoms are arranged in space. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "However, the complexity of a thermodynamically stable sugar stereoisomer has only two possibilities: D or L depending upon whether the C-O ring bond points “up” or “down”."
• "A stereoisomer can have any chemical properties any other molecule can, relatively unrelated biologically, their general properties will be similar."
• "It is, however, the wrong stereoisomer mirror image - this no links thing is getting really annoying; isn't this the point of comment moderation?"