** Node ( botany ), the place on a plant stem where a leaf is attached

** Node 4, a proposed module of the International Space Station

** Node Module, a planned module of the International Space Station

** Node ( physics ), a point along a standing wave where the wave has minimal amplitude

** Node ( linguistics ), a branch point in the Tree model, or Node Theory, of language evolution

** Node Eudromaeosauria

** Slave Node Position Detection ( SNPD ) allows node address assignment after power-up

** Secondary: metastasis, Virchow's Node, Neuroblastoma, and Chronic Lymphocytic Leukemia.