Gla·den n. Bot. Sword grass; any plant with sword-shaped leaves, especially the European Iris fœtidissima. [Written also gladwyn, gladdon, and glader.]
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gladdon
n : iris with purple flowers and evil-smelling leaves; southern
and western Europe and North Africa [syn: stinking iris,
gladdon iris, stinking gladwyn, roast beef plant,
Iris foetidissima]