From Wiktionary, the free dictionary
From inter- + medullary.
intermedullary (not comparable)
- Between medullae
2015 September 15, “Using MDEFT MRI Sequences to Target the GPi in DBS Surgery”, in PLOS ONE[1], →DOI:P and A were determined at the posterior and anterior intersection of the internal capsule and the medial intermedullary lamina respectively.