jack wood

[Eng. jack, and wood.] Comm.: The wood of Artocarpus integrifolia . It is a furniture and fancy wood. Jā-cob (1), 8. [Lat. Jacobus , remotely from the patriarch Jacob, Heb. Yaaqob .] [JACK.] Jacob's-ladder, s . 1. Botany : The genus Polemonium. One species, the Blue Jacob's-ladder ( Polemonium cæruleum ), a plant with pinnate glabrous leaves and large blue or occasionally white flowers. 2. Naut .: A rope ladder with wooden rounds. 3. Mech .: The elevator used in brew house machinery for raising spent mash-stuff.