Noun screw augur has 1 sense
  1. screw augur, Spiranthes cernua - an orchid of the genus Spiranthes having tall erect densely flowered spiraling clusters of creamy white vanilla-scented flowers; widely distributed especially in low damp places of eastern and central North America
    --1 is a kind of ladies' tresses, lady's tresses
    --1 is a member of Spiranthes, genus Spiranthes
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