gangliosidosisnoun [ C ]
uk/ˌɡæŋ.ɡli.əʊ.saɪˈdəʊ.sɪs/us/ˌɡæŋ.ɡliˌoʊ.saɪˈdoʊ.sɪs/plural gangliosidoses specializedone of a group of genetic diseases in which someone's body does not have enough of the proteins needed to break down lipids (= fats in living cells), resulting in problems with the nerves and muscles