meso-compound

https://doi.org/10.1351/goldbook.M03839
A term for the achiral member(s) of a set of diastereoisomers which also includes one or more chiral members. For example:
M03839.png
Source:
PAC, 1996, 68, 2193. 'Basic terminology of stereochemistry (IUPAC Recommendations 1996)' on page 2211 (https://doi.org/10.1351/pac199668122193)