RETROGRESSIONS

Scrabble 15 Words With Friends 17

Scrabble letter values: R₁E₁T₁R₁O₁G₂R₁E₁S₁S₁I₁O₁N₁S₁ = 15

Definition

RETROGRESSIONS is the plural of RETROGRESSION.

noun RETROGRESSION: passing from a more complex to a simpler biological form.

Synonyms of RETROGRESSION: degeneration