How many letters does the top answer for “having two leaves; two-leaved.” have?

The most common answer is bifoliate (9 letters).

Crossword clue: having two leaves; two-leaved.

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

bifoliate 9 letters web-def

Having two leaves; two-leaved.

having three leaves; three-leaved. 60% similar → triphyllous

four-leaved; having the leaves in whorls of four. 50% similar → quadrifoil, quadrifoliate

having two leaves, as a calyx, etc. 50% similar → diphyllous