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3 definitions found

From: Webster's Revised Unabridged Dictionary (1913)

 Je·ru·sa·lem n.  The chief city of Palestine, intimately associated with the glory of the Jewish nation, and the life and death of Jesus Christ.
 Jerusalem artichoke [Perh. a corrupt. of It. girasole i.e., sunflower, or turnsole. See Gyre, Solar.] Bot. (a) An American plant, a perennial species of sunflower (Helianthus tuberosus), whose tubers are sometimes used as food. (b) One of the tubers themselves.
 Jerusalem cherry Bot., the popular name of either of two species of Solanum (Solanum Pseudo-capsicum and Solanum capsicastrum), cultivated as ornamental house plants. They bear bright red berries of about the size of cherries.
 Jerusalem oak Bot., an aromatic goosefoot (Chenopodium Botrys), common about houses and along roadsides.
 Jerusalem sage Bot., a perennial herb of the Mint family (Phlomis tuberosa).
 Jerusalem thorn Bot., a spiny, leguminous tree (Parkinsonia aculeata), widely dispersed in warm countries, and used for hedges.
 The New Jerusalem, Heaven; the Celestial City.

From: Webster's Revised Unabridged Dictionary (1913)

 Oak n.
 1. Bot. Any tree or shrub of the genus Quercus.  The oaks have alternate leaves, often variously lobed, and staminate flowers in catkins.  The fruit is a smooth nut, called an acorn, which is more or less inclosed in a scaly involucre called the cup or cupule.  There are now recognized about three hundred species, of which nearly fifty occur in the United States, the rest in Europe, Asia, and the other parts of North America, a very few barely reaching the northern parts of South America and Africa. Many of the oaks form forest trees of grand proportions and live many centuries. The wood is usually hard and tough, and provided with conspicuous medullary rays, forming the silver grain.
 2. The strong wood or timber of the oak.
 Note:Among the true oaks in America are: Barren oak, or Black-jack, Quercus nigra.
 Basket oak, Quercus Michauxii.
 Black oak, Quercus tinctoria; -- called also yellow oak or quercitron oak.
 Bur oak (see under Bur.), Quercus macrocarpa; -- called also over-cup or mossy-cup oak.
 Chestnut oak, Quercus Prinus and Quercus densiflora.
 Chinquapin oak (see under Chinquapin), Quercus prinoides.
 Coast live oak, Quercus agrifolia, of California; -- also called enceno.
 Live oak (see under Live), Quercus virens, the best of all for shipbuilding; also, Quercus Chrysolepis, of California.
 Pin oak. Same as Swamp oak.
 Post oak, Quercus obtusifolia.
 Red oak, Quercus rubra.
 Scarlet oak, Quercus coccinea.
 Scrub oak, Quercus ilicifolia, Quercus undulata, etc.
 Shingle oak, Quercus imbricaria.
 Spanish oak, Quercus falcata.
 Swamp Spanish oak, or Pin oak, Quercus palustris.
 Swamp white oak, Quercus bicolor.
 Water oak, Quercus aquatica.
 Water white oak, Quercus lyrata.
 Willow oak, Quercus Phellos.
     Among the true oaks in Europe are: Bitter oak, or Turkey oak, Quercus Cerris (see Cerris).
 Cork oak, Quercus Suber.
 English white oak, Quercus Robur.
 Evergreen oak, Holly oak, or Holm oak, Quercus Ilex.
 Kermes oak, Quercus coccifera.
 Nutgall oak, Quercus infectoria.
 Note:Among plants called oak, but not of the genus Quercus, are: African oak, a valuable timber tree (Oldfieldia Africana).
 Australian oak or She oak, any tree of the genus Casuarina (see Casuarina).
 Indian oak, the teak tree (see Teak).
 Jerusalem oak. See under Jerusalem.
 New Zealand oak, a sapindaceous tree (Alectryon excelsum).
 Poison oak, a shrub once not distinguished from poison ivy, but now restricted to Rhus toxicodendron or Rhus diversiloba.
 Silky oak or  Silk-bark oak, an Australian tree (Grevillea robusta).
 Green oak, oak wood colored green by the growth of the mycelium of certain fungi.
 Oak apple, a large, smooth, round gall produced on the leaves of the American red oak by a gallfly (Cynips confluens). It is green and pulpy when young.
 Oak beauty Zool., a British geometrid moth (Biston prodromaria) whose larva feeds on the oak.
 Oak gall, a gall found on the oak. See 2d Gall.
 Oak leather Bot., the mycelium of a fungus which forms leatherlike patches in the fissures of oak wood.
 Oak pruner. Zool. See Pruner, the insect.
 Oak spangle, a kind of gall produced on the oak by the insect Diplolepis lenticularis.
 Oak wart, a wartlike gall on the twigs of an oak.
 The Oaks, one of the three great annual English horse races (the Derby and St. Leger being the others).  It was instituted in 1779 by the Earl of Derby, and so called from his estate.
 To sport one's oak, to be “not at home to visitors,” signified by closing the outer (oaken) door of one's rooms. [Cant, Eng. Univ.]

From: WordNet (r) 2.0

 Jerusalem oak
      n : Eurasian aromatic oak-leaved goosefoot with many
          yellow-green flowers; naturalized North America [syn: feather
          geranium, Mexican tea, Chenopodium botrys, Atriplex