organ part cardinal organ part UBERON:0000064 uberon SCTID:113343008 AAO:0011124 A multicellular structure that is a part of an organ. currently defined in a very broad sense, may be replaced by more specific classes in the future SCTID:91717005 regional part of organ BIRNLEX:16 FMA:82472 EFO:0000635 multicellular anatomical structure