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li·po·fus·cin·o·sis | \ -ˌfəs-ə-ˈnō-səs 
, -ˌfyüs- \
, -ˌfyüs- \ plural lipofuscinoses\ -ˌsēz \
\Medical Definition of lipofuscinosis
: a storage disease (as Batten disease) marked by abnormal accumulation of lipofuscin in tissues especially of the brain
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