How many letters does the top answer for “(used of solutions) having the same or equal osmotic pressure” have?

The most common answer is isosmotic (9 letters).

Crossword clue: (used of solutions) having the same or equal osmotic pressure

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

isosmotic 9 letters wn-def

(used of solutions) having the same or equal osmotic pressure

isotonic 8 letters wn-def

(used of solutions) having the same or equal osmotic pressure