Final answer:
To build a medical word that means condition of dust in the lungs, you can use the word parts pneumo-, -o-, and -coniosis.
Step-by-step explanation:
To build a medical word that means condition of dust in the lungs, you can use the following word parts:
- Pneumo-: meaning 'lung'
- -o-: a combining vowel
- -coniosis: meaning 'condition of the dust in the lungs'
Putting it all together, the medical word is pneumoconiosis. This term is commonly used to refer to a group of lung diseases caused by inhaling dust particles, such as coal dust or asbestos fibers, over a prolonged period of time.