A common definition of life, including the one in Biology SE Life requires physical entitites to have the capability of being able to reproduce.
A process defining organisms that grow and adapt to stimuli while maintaining a state of organization and energy production and being capable of reproduction.
Under this definition one could think that a specialized cell like a bone cell or a skin cell doesnt have life. But also, a common definition of cell, including the one here in Biology SE says a cell is
the smallest unit of life.
So, my question is, are specialized cells which dont reproduce supposed to have life? This question came up to me thinking of other living organisms which have tissues which seems to be inert and survive hundreds or thousands of years (ie, wood, bones, etc.)