Emordnilaps, aka Semordnilap(s)

(Etymology)
A reverse spelling of palindromes. "Semordnilap", according
to author O. V. Michaelsen in his 1997 book Words at Play, was probably
first used by recreational linguist Dmitri Borgmann, cited by Martin
Gardner in the revised edition of Charles Carroll Bombaugh's Oddities
and Curiosities of Words and Literature (1961) [1].

The underlying concept (but not the term) is found at least as far back
as Lewis Carroll's Sylvie and Bruno (1889).

Semordnilap is also autological; that is, it is a self-describing word,
as the word semordnilap is itself a semordnilap.

aka https://en.wiktionary.org/wiki/anadrome
https://en.wiktionary.org/wiki/levidrome

______________________________ anacyclique in French ???

https://fr.wiktionary.org/wiki/anacyclique

(Antiquité) (Littéraire) Qualifiait un poème de quatre ou six vers
latins dont les mots des deux ou trois premiers se retrouvent dans les
derniers, mais placés dans l'ordre inverse, le premier devenant le dernier