How many letters does the top answer for “like, or characteristic of, the hymenoptera; pertaining to the hymenoptera.” have?

The most common answer is hymenopteral (12 letters).

Crossword clue: like, or characteristic of, the hymenoptera; pertaining to the hymenoptera.

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

hymenopteral 12 letters web-def

Like, or characteristic of, the Hymenoptera; pertaining to the Hymenoptera.

hymenopterous 13 letters web-def

of or relating to insects of the order Hymenoptera