This is the 4197th most frequent French word.
dits
"Dits" means "said" or "called" (plural, masculine) in English.
In this sentence, 'dits' is used as an adjective meaning 'so-called', qualifying 'tourist places'.
Les endroits dits touristiques attirent beaucoup de visiteurs chaque année.
The so-called tourist places attract many visitors every year.
Here, 'dits' functions to introduce a descriptive or commonly given name of these animals.
Ces animaux, dits nocturnes, sortent principalement la nuit.
These animals, called nocturnal, mostly come out at night.
In this context, 'dits' is used as a modifier before 'Precambrian', providing an established classification or naming.