medullated

adjective
med·ul·lat·ed | \ˈme-də-ˌlā-təd, ˈme-jə-\

Definition of medullated 

1 of a nerve fiber : myelinated

2 of a hair or wool fiber : having a hollow space within the cortex (see cortex sense 1a(2))

First Known Use of medullated

1867, in the meaning defined at sense 1

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The first known use of medullated was in 1867

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medullated

adjective
med·ul·lat·ed | \ˈmed-ᵊl-ˌāt-əd, ˈmej-ə-ˌlāt- \

Medical Definition of medullated 

2 : having a medulla used of fibers other than nerve fibers

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