Polemonium coeruleum having corymbs of drooping flowers usually blue Gray
(gcide) | Jacob \Ja"cob\, n. [Cf. F. Jacob. See 2d Jack.]
A Hebrew patriarch (son of Isaac, and ancestor of the Jews),
who in a vision saw a ladder reaching up to heaven (--Gen.
xxviii. 12); -- also called Israel.
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And Jacob said . . . with my staff I passed over this
Jordan, and now I am become two bands. --Gen. xxxii.
9, 10.
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Thy name shall be called no more Jacob, but Israel.
--Gen. xxxii.
28.
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Jacob's ladder.
(a) (Bot.) A perennial herb of the genus Polemonium
({Polemonium c[oe]ruleum), having corymbs of drooping
flowers, usually blue. Gray}.
(b) (Naut.) A rope ladder, with wooden steps, for going
aloft. --R. H. Dana, Jr.
(c) (Naut.) A succession of short cracks in a defective spar.
Jacob's membrane. See Retina.
Jacob's staff.
(a) A name given to many forms of staff or weapon, especially
in the Middle Ages; a pilgrim's staff. [Obs.] --Spenser.
(b) (Surveying) See under Staff.
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