also: ほつねつ
noun, noun or participle which takes 'suru', intransitive verb
generation of heat; heat production
Only with reading はつねつ
Refers to the physical process of producing heat, often in scientific or technical contexts.
この機械は発熱量が大きい。
This machine generates a large amount of heat.
noun, noun or participle which takes 'suru', intransitive verb
Commonly used for a feverish condition, especially in medical or everyday health contexts.
風邪で発熱したので、学校を休んだ。
I had a fever from a cold, so I stayed home from school.
発熱が続くようなら病院に行ってください。
If the fever persists, please go to the hospital.