1. Slender fern of northern North America with shining chestnut-coloured stipes and bipinnate fronds with usually distinct marginal sori
   - Alpine woodsia, northern woodsia, flower-cup fern

Type of: woodsia

• sustained
• sustained yield
• sustainer
• sustaining pedal
• sustaining program
• sustainment
• sustenance
• sustentacular
• sustentation
• sustentative
• susurrant
• susurrate
• susurration
• susurrous
• susurrus
• Sutherland
• sutler
• sutra
• suttee
• sutura
• sutura coronalis
• sutura frontalis
• sutura intermaxillaris
• sutura internasalis
• sutura lamboidea