Tay-Sachs Disease
uk
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/teɪˈsæks dɪˌziːz/us
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/ˈteɪˌsæks dɪˌziːz/ noun specialized a genetic disease in which the body is unable to get rid of a fatty substance called ganglioside so that it builds up in the brain, causing the nerves to stop working properly and eventually leading to death, usually before the age of three: For a child to have Tay-Sachs Disease, both parents must have the defective gene responsible. 只有當父母都攜帶有缺陷的相關基因時，他們的孩子才會罹患家族黑蒙性白癡病。