How many letters does the top answer for “metallurgy scientist” have?

The most common answer is jacquin (7 letters).

Crossword clue: metallurgy scientist

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

jacquin 7 letters wd-fact-v3

lomonosov 9 letters wd-fact-v3

play 4 letters wd-fact-v3

participate in games or sport

scientist scientist 50% similar → bacon, yakovlev