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A genus of trees constituted by the oak. See Oak.

f Byrsonima crassifolia, used in tanning; of Alchornea latifolia, used medicinally; or of Quercus ilex, the cork tree.

The Quercus nigra, or barren oak.

's head. [Commonly written burr.] Bur oak (Bot.), a useful and ornamental species of oak (Quercus macrocarpa) with ovoid acorns inclosed in deep cups imbricated with pointed scales. It grows in the Middle and Western United States, and its wood is tough, close-grained, and durable. -- Bur reed (Bot.), a plant of the g…

A species of oak (Quercus cerris) native in the Orient and southern Europe; -- called also bitter oak and Turkey oak.

edible nat. [Written also chincapin and chinkapin.] Chinquapin oak, a small shrubby oak (Quercus prinoides) of the Atlantic States, with edible acorns. -- Western Chinquapin, an evergreen shrub or tree (Castanopes chrysophylla) of the Pacific coast. In California it is a shrub; in Oregon a tree 30 to 125 feet high.…

The outer layer of the bark of the cork tree (Quercus Suber), of which stoppers for bottles and casks are made. See Cutose.

A common evergreen oak, of Europe (Quercus Ilex); -- called also ilex, and holly.

The holm oak (Quercus Ilex).

A small European evergreen oak (Quercus coccifera) on which the kermes insect (Coccus ilicis) feeds. J. Smith (Dict. Econ. Plants). Kermes mineral. (a) (Old Chem.) An artificial amorphous trisulphide of antimony; -- so called on account of its red color. (b) (Med. Chem.) A compound of the trioxide and trisulphide of an…

train of cars on a bridge, or wind pressure on a roof. Live oak (Bot.), a species of oak (Quercus virens), growing in the Southern States, of great durability, and highly esteemed for ship timber. In California the Q. chrysolepis and some other species are also called live oaks. -- Live ring (Engin.), a circular train…

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…

A white crystalline substance, C6H7(OH)5, found in acorns, the fruit of the oak (Quercus). It has a sweet taste, and is regarded as a pentacid alcohol.

A glucoside extracted from the bark of the oak (Quercus) as a bitter citron-yellow crystalline substance, used as a pigment and called quercitron.

The yellow inner bark of the Quercus tinctoria, the American black oak, yellow oak, dyer's oak, or quercitron oak, a large forest tree growing from Maine to eastern Texas.

The California white oak (Quercus lobata).

e young are parasitic upon spiders and insects. -- Scarlet oak (Bot.), a species of oak (Quercus coccinea) of the United States; -- so called from the scarlet color of its leaves in autumn. -- Scarlet runner (Bot.), the scarlet bean. -- Scarlet tanager. (Zoöl.) See under Tanager.

of several dwarfish species of oak. The scrub oak of New England and the Middle States is Quercus ilicifolia, a scraggy shrub; that of the Southern States is a small tree (Q. Catesbæi); that of the Rocky Mountain region is Q. undulata, var. Gambelii. -- Scrub robin (Zoöl.), an Australian singing bird of the genus Drym…

a shop; as, to hang out one's shingle. [Jocose, U. S.] Shingle oak (Bot.), a kind of oak (Quercus imbricaria) used in the Western States for making shingles.

, a name given to several kinds of oak which grow in swampy places, as swamp Spanish oak (Quercus palustris), swamp white oak (Q. bicolor), swamp post oak (Q. lyrata). -- Swamp ore (Min.), big ore; limonite. -- Swamp partridge (Zoöl.), any one of several Australian game birds of the genera Synoicus and Excalfatoria,…