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diastereomer

[dahy-uh-ster-ee-uh-mer, -steer-]
noun Chemistry.
  1. either of a pair of stereoisomers that are not mirror images of each other.
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Compare enantiomer.

Origin of diastereomer

First recorded in 1935–40; dia- + stereo(iso)mer
Also called di·a·ster·e·o·i·so·mer [dahy-uh-ster-ee-oh-ahy-suh-mer, -steer-] /ˌdaɪ əˌstɛr i oʊˈaɪ sə mər, -ˌstɪər-/.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018