Crossword clue: free-swimming mostly freshwater flatworms; popular in laboratory studies for the ability to regenerate lost parts

The most common answer is planaria (8 letters).

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

planaria 8 letters wn-def

free-swimming mostly freshwater flatworms; popular in laboratory studies for the ability to regenerate lost parts

planarian 9 letters wn-def

free-swimming mostly freshwater flatworms; popular in laboratory studies for the ability to regenerate lost parts