. "\"The biological process whose specific outcome is the progression of a lung-associated mesenchyme from an initial condition to its mature state. This process begins with the formation of lung-associated mesenchyme and ends with the mature structure. Lung-associated mesenchyme is the tissue made up of loosely connected mesenchymal cells in the lung.\" [GOC:dph, GOC:mtg_lung]" . . "lung-associated mesenchyme development" . "lung mesenchyme development" . "pulmonary mesenchyme development" . .