垂迹[suijaku] temporary manifestation by a buddha (in order to save people)
筆迹[hisseki] handwriting
真迹[shinseki] true autograph

事迹[jiseki] evidence
本地垂迹説[honjisuijakusetsu] manifestation theory (holding that Shinto gods are manifestations of buddhas)
迹門[shakumon] first half of the Lotus Sutra, in which the Buddha appears as a spatiotemporally restricted being

延髄[enzui] medulla oblongata
骨髄[kotsuzui] bone marrow
歯髄[shizui] (tooth) pulp
心髄[shinzui] true meaning
精髄[seizui] essence

脊髄[sekizui] spinal cord
脳髄[nouzui] brain
髄虫[meichuu] pyralid larva
骨髄炎[kotsuzuien] osteomyelitis
脊髄炎[sekizuien] myelitis