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Noun: Jacob's ladder
  1. (nautical) a hanging ladder of ropes or chains supporting wooden or metal rungs or steps
    - jack ladder, pilot ladder
     
  2. Pinnate-leaved European perennial having bright blue or white flowers
    - Greek valerian, charity, Polemonium caeruleum, Polemonium van-bruntiae, Polymonium caeruleum van-bruntiae

Derived forms: Jacob's ladders

Type of: ladder, polemonium

Encyclopedia: Jacob's ladder