How many letters does the top answer for “a crystalline alkaloid obtained from morphia. it is a powerful emetic.” have?

The most common answer is apomorphia (10 letters).

Crossword clue: a crystalline alkaloid obtained from morphia. it is a powerful emetic.

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

apomorphia 10 letters web-def

A crystalline alkaloid obtained from morphia. It is a powerful emetic.

apomorphine 11 letters web-def

a morphine derivative that is not as strong as morphine; used as an emetic and in small doses as a sedative