1. Tall fern of northern temperate regions having graceful arched fronds and sporophylls resembling ostrich plumes
   - ostrich fern, fiddlehead, Matteuccia struthiopteris, Pteretis struthiopteris, Onoclea struthiopteris

Derived forms: shuttlecock ferns

Type of: fern

Part of: genus Matteuccia, genus Pteretis, Matteuccia, Pteretis

• silkworm
• silkworm moth
• silkworm seed
• silky
• silky anteater
• silky cornel
• silky dogwood
• silky elm
• silky oak
• silky pocket mouse
• silky tamarin
• silky terrier
• silky willow
• silky wisteria
• silky-haired
• silky-leafed
• silky-leaved
• sill
• sillabub
• Sillaginidae
• Sillago
• sillcock
• sillily
• silliness
• sillock