Define 'corm' in plant propagation.

A corm is defined as a swollen underground storage organ that produces new shoots. This structure serves as a reservoir of nutrients and energy, allowing plants to survive adverse conditions and regenerate during favorable seasons. Corms are fleshy and have a solid, swollen base, which differentiates them from bulbs that have layers. When the conditions are right, the corm can sprout, producing new growth and further propagating the plant.

This definition highlights the role of corms in the life cycle of specific plants, particularly in regions where they may experience dormancy. Understanding corms is crucial for proper plant care and propagation, as they are integral in the growth and development of various perennial plants.