1. Plural of osmundine; compounds or substances derived from or related to osmunda ferns, or fibers obtained from the roots of osmunda ferns used historically in horticulture and plant cultivation.
Usage: botanical; historical; chiefly British

Examples

• Gardeners historically used osmundines as a growing medium for orchids and other delicate plants.
• The osmundines were harvested from the roots of royal ferns and processed for horticultural use.
• Victorian plant collectors valued osmundines for their ability to retain moisture while providing good drainage.
• The texture of osmundines made them ideal for mounting epiphytic plants in greenhouse cultivation.