|—n , pl -lons, -la|
|1.||the part of the diencephalon of the brain that includes the thalamus, pineal gland, and adjacent structures|
|2.||another name for diencephalon|
|the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).|
|given to using long words.|
thalamencephalon thal·a·men·ceph·a·lon (thāl'ə-měn-sěf'ə-lŏn')
The part of the diencephalon comprising the thalamus and its associated structures.