cold-blooded

Meaning

1. adjective Having an unregulated body temperature; ectothermic.
2. adjective Lacking emotion or compunction.
3. adjective Of a type of horse: tall and muscular, usually good-natured and suitable for heavy work.
4. adjective Of an engine or vehicle: difficult to start; runs poorly until warmed up.

Similar words

poikilothermic heterothermic poikilothermous cold inhuman inhumane insensate cool savage ferocious

Word family

cold-bloodedly cold-bloodedness cold-bloodednesses coldblood