Definition of Jacob's ladder
1 : any of a genus (Polemonium) of herbs of the phlox family that have pinnate leaves, a bell-shaped corolla, and a several-seeded capsule; especially : a perennial herb (P. caeruleum) with bright blue or occasionally white flowers
2 : a marine ladder of rope or chain with wooden or iron rungs
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Origin and Etymology of jacob's ladder
from the ladder seen in a dream by Jacob in Genesis 28:12
First Known Use: 1733
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Britannica.com: Encyclopedia article about Jacob's ladder
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