paraformaldehyde

par.a.for.mal.de.hyde

n.（名词）
A white solid polymer of formaldehyde, (HCHO) n, where n is at least ', used as a disinfectant, fumigant, and fungicide.
多聚甲醛，仲甲醛：一种用作杀虫剂、熏蒸剂和杀真菌剂的白色固体甲醛聚合物，(HCHO) n, 其中 n 不少于'