How are osmosis and diffusion related?

Diffusion is the movement of particles from a region of high concentration to low concentration. Osmosis is actually a special kind of diffusion involving water molecules which move from high water concentration to low water concentration through a permeable membrane. read more

Osmosis is a type of diffusion that occurs across a semi-permeable membrane and tends to draw fluids from areas with relatively low particulate concentrations to areas with relatively high particulate concentration. Diffusion is the result of random processes, but osmosis occurs because of the chemical properties of the involved substances. read more

Osmosis is diffusion of water in and out of the cell. Scientists have thus simply made it more complicated than it has to be. I suppose they did it to make conversation easier. Instead of saying "The diffusion of water in or out of the cell", they can say "Osmosis". read more