Strong's G3452 · Greek

μυελός

muelos · moo-el-os'

perhaps a primary word; the marrow

Scholarly Lexicons

Abbott-Smith Manual Greek Lexicon

 1 μυελός , -οῦ, ὁ , [in LXX: Ge 45:18 ( חֵלֶב ), Jb 21:24 ( מֹחַ ) Jb 33:24 *;] marrow : He 4:12 .† 

G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain