How many letters does the top answer for “a zoologist who studies protozoans” have?

The most common answer is protozoologist (14 letters).

Crossword clue: a zoologist who studies protozoans

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

protozoologist 14 letters wn-def

a zoologist who studies protozoans

a zoologist who studies birds 50% similar → ornithologist

a zoologist who studies fishes 50% similar → ichthyologist

a zoologist who studies insects 50% similar → entomologist