How many letters does the top answer for “relating or belonging to the echinoderms.” have?

The most common answer is echinodermal (12 letters).

Crossword clue: relating or belonging to the echinoderms.

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

echinodermal 12 letters web-def

Relating or belonging to the echinoderms.

belonging or relating to the willow. 50% similar → salicaceous

of or relating or belonging to a city 50% similar → civic

of or relating to or belonging to the diptera 50% similar → dipterous