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stereo-isomer
stereo-isomer n. 
/ˌstɪərɪəʊˈʌɪsəmə/, /ˌstɪrioʊˈaɪsəmər/ Chemistry one of two or more isomeric compounds which are held to differ by virtue of a difference in the spatial arrangement (not in the order of connection) of the atoms in the molecule.
Brit. /ˌstɛrɪəʊˈʌɪsəmə/
, /ˌstɛrɪəʊˈʌɪsəmə//ˌstɪərɪəʊˈʌɪsəmə/U.S. /ˌstɛrioʊˈaɪsəmər/
, /ˌstɛrioʊˈaɪsəmər//ˌstɪrioʊˈaɪsəmər/ΘΚΠ
the world > matter > chemistry > isomerism > [noun] > stereo-isomerism > stereo-isomer
stereoisomeride1893
stereo-isomer1894
stereomer1898
1894 G. M'Gowan tr. A. Bernthsen Text-bk. Org. Chem. (ed. 2) ix. 236 By the conversion of the hexonic acids (through the hexoses) into the corresponding alcohols (mannite, etc.), the number of possible stereo-isomers is diminished.
1903 Slosson in Amer. Chem. Jrnl. Apr. 294 My work on these bodies was chiefly directed towards the preparation of stereoisomers.
1906 Athenæum 28 Apr. 519/2 The two different lactic acids..are supposed to be stereo-isomers of one another.
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