黒こっ化か

noun, noun or participle which takes 'suru'

blackening; melanization

Refers to the process of becoming black or dark, often used in biological or chemical contexts (e.g., melanization in insects, blackening of materials).

• 昆こん虫ちゅうの血けつリンパが黒こっ化かする現げん象しょうは、免めん疫えき反はん応のうの一ひとつだ。

  The phenomenon of insect hemolymph blackening is one type of immune response.

• この金きん属ぞくは高こう温おんで黒こっ化かする。

  This metal blackens at high temperatures.