n. 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.
- Jacob's ladder. (a) (Bot.) A perennial herb of the genus Polemonium having corymbs of drooping flowers, usually blue. (b) (Naut.) A rope ladder, with wooden steps, for going aloft. (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 ...
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