This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Of or pertaining to the thalamus

adj. Of or pertaining to a thalamus or to thalami.

Of or pertaining to the optic thalamus.

"Kim suffered a stroke several years ago and suffers from a post-stroke complication called thalamic pain syndrome."

thalamic commissure   

subcortical    preoptic    prefrontal    ventral    hypothalamic    cerebellar    medullary    hippocampal    transcortical    tibial