endotherm
🇺🇸
/ˈɛndəˌθɚm/
🇬🇧
/'endəθɜ:m/
A living thing, like a bird or a human, that keeps its body warm by making its own heat.
Birds are endotherms, which means they can stay warm even when it's cold outside.
A chemical reaction that needs to take in heat from the environment to work.
When you dissolve something like sugar in water, it's an endothermic reaction because it takes heat from the surroundings.