mammillothalamic tract
noun
mam·mil·lo·tha·lam·ic tract
variants:
or mamillothalamic tract \ mə-ˌmil-ō-thə-ˈlam-ik- 
\
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Medical Definition of mammillothalamic tract
: a bundle of nerve fibers that runs from the mammillary body to the anterior nucleus of the thalamus
— called also mammillothalamic fasciculus