϶
Definition from Wiktionary, the free dictionary

See also: Appendix:Variations of "e"
Translingual[edit]
Etymology[edit]
Reversed (or backwards) version of the lowercase lunate epsilon ϵ. Introduced by Giuseppe Peano in 1889 in "Principles of arithmetic, presented by a new method" [1].
Symbol[edit]
϶
 (mathematics) "such that"