How many letters does the top answer for “of or relating to the stomach and the duodenum” have?

The most common answer is gastroduodenal (14 letters).

Crossword clue: of or relating to the stomach and the duodenum

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

gastroduodenal 14 letters wn-def

of or relating to the stomach and the duodenum

in or relating to the duodenum 67% similar → duodenal

of or relating to the stomach and intestines 50% similar → gastrointestinal, gi

relating to or involving the stomach 50% similar → gastric, stomachic