How many letters does the top answer for “the common support, often branched, of certain species of social infusoria.” have?

The most common answer is zoocytium (9 letters).

Crossword clue: the common support, often branched, of certain species of social infusoria.

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

zoocytium 9 letters web-def

The common support, often branched, of certain species of social Infusoria.

zooecytium 10 letters web-def

The common support, often branched, of certain species of social Infusoria.