CPA Heb4:12 :ܘܕܦܪ̈ܩܝܐ ܘܕܡܘܚܐ ܘܕܓܪ̈ܡܝܐ‏ : of the joints, and the marrow {and} of the bones
See the entire entry for mūḥ, mūḥā n.m. brain