well defined 
adjective
Clearly defined or described: without well-defined goals it is likely that efforts will be misdirected...
- There have always been clear and well-defined roles for the village Eurovision party.
- He has well-defined square, straight shoulders and a muscular chest kept remarkably youthful by a healthy exercise regimen.
- His brief was therefore clear and well-defined but he exceeded it.
- thermoregulate
- thermoregulation
- thermoregulatory
- thermos
- thermos bottle
- thermoset
- thermosetting
- thermos flask
- thermosphere
- thermostable
- thermostat
- thermostatic
- thermostatically
- thermotactic
- thermotaxic
- thermotaxis
- thermotropic
- thermotropism
- the road to hell is paved with good intentions
- the roaring forties
- the Rock
- the Rockies
- theroid
- the roof of the world
- theropod