Definition: "Rhododendron Dell" is a type of deciduous tree that grows to be up to 50 feet tall, with branches reaching out like a bouquet of flowers. Its leaves are often large, glossy, and sometimes have deep green points on them. The term "Rhododendron Della" refers to the flowering plant (also known as Rhododendron), which is a species of flowering tree native to South America that produces large, showy red or pink flowers in early spring. The word "Dell," however, seems to be an idiom or contraction, possibly referring to the specific variety or cultivar of rhododendron you're referring to.