How many letters does the top answer for “having two or more digits wholly or partly united. see syndactylism.” have?

The most common answer is syndactyl (9 letters).

Crossword clue: having two or more digits wholly or partly united. see syndactylism.

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

syndactyl 9 letters web-def

Having two or more digits wholly or partly united. See Syndactylism.

syndactyle 10 letters web-def

Having two or more digits wholly or partly united. See Syndactylism.