How many letters does the top answer for “the dissection, or anatomy, of the viscera.” have?

The most common answer is splanchnotomy (13 letters).

Crossword clue: the dissection, or anatomy, of the viscera.

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

splanchnotomy 13 letters web-def

The dissection, or anatomy, of the viscera.

the anatomy or dissection of birds. 50% similar → ornithotomy

the anatomy or dissection of fishes. 50% similar → ichthyotomy

the anatomy or dissection of reptiles. 50% similar → herpetotomy