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Noun: screw augur
  1. An orchid of the genus Spiranthes having tall erect densely flowered spiralling clusters of creamy white vanilla-scented flowers; widely distributed especially in low damp places of eastern and central North America
    - Spiranthes cernua

Derived forms: screw augurs

Type of: ladies' tresses, lady's tresses

Part of: genus Spiranthes, Spiranthes