| dullard | (noun) a person who evokes boredom | Synonyms: bore |
|---|
| (noun) a person who is not very bright | Synonyms: dolt, pillock, poor fish, pudden-head, pudding head, stupe, stupid, stupid person |
| dullness | (noun) lack of sensibility | - |
|---|
| (noun) without sharpness or clearness of edge or point | Synonyms: bluntness |
| (noun) the quality of lacking interestingness | - |
| (noun) a lack of visual brightness | - |
| (noun) the quality of being slow to understand | Synonyms: obtuseness |
| medulla | (noun) the inner part of an organ or structure in plant or animal | - |
|---|
| (noun) lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata) | Synonyms: bulb, medulla oblongata |
| (noun) a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers | Synonyms: myelin, myeline |