The term 'Tiny Plant Part' can be summarized by the crossword solution 'ROOTLET, ' which is a seven-letter word. Rootlets are small, thin roots that grow from the main root of a plant. They are important for absorbing water and nutrients from the soil, as well as providing stability to the plant. Rootlets also help to anchor the plant in the ground and protect it from being uprooted by wind or other forces.