词根词缀：encephalo-, encephal-

【来源及含义】Greek: brain; that which is inside the head

【同源单词】amyelencephalia, anencephalia, anencephalic, anencephalology, anencephalous, anencephaly

词根词缀：malaco-, malac-, malako-, -malacia

【来源及含义】Greek: soft, softness; abnormal softening, soft-bodied

【同源单词】adenomalacia, angiomalacia, arteriomalacia, bronchomalacia, cardiomalacia, cerebromalacia

词根词缀：polio-

【来源及含义】Greek: gray; pertaining to the "gray matter" of the nervous system, brain, and the spinal cord

【同源单词】dyspigmentation, poliocidal, polioclastic, poliodystrophia, polioencephalitis, polioencephalomalacia