root

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root

 [roōt]
1. the descending and subterranean part of a plant.
2. that portion of an organ, such as a tooth, hair, or nail, that is buried in the tissues, or by which it arises from another structure, or the part of a nerve that is adjacent to the center to which it is connected.
Tooth anomalies with variations in root form. From Darby and Walsh, 1994.
anterior root the anterior, or motor, division of each spinal nerve, attached centrally to the spinal cord and joining peripherally with the posterior root to form the nerve before it emerges from the intervertebral foramen; it conveys motor fibers to skeletal muscle and contains preganglionic autonomic fibers at the thoracolumbar and sacral levels. Called also ventral root.
dorsal root posterior root.
motor root anterior root.
nerve r's the series of paired bundles of nerve fibers which emerge at each side of the spinal cord, termed dorsal (or posterior) or ventral (or anterior) according to their position. There are 31 pairs (8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal), each corresponding dorsal and ventral root joining to form a spinal nerve. Certain cranial nerves, e.g., the trigeminal, also have nerve roots.
posterior root the posterior, or sensory, division of each spinal nerve, attached centrally to the spinal cord and joining peripherally with the anterior root to form the nerve before it emerges from the intervertebral foramen; each posterior root bears a spinal ganglion that conveys sensory fibers to the spinal cord. Called also dorsal root.
sensory root posterior root.
ventral root anterior root.

root

(rūt), [TA]
1. The primary or beginning portion of any part, as of a nerve at its origin from the brainstem or spinal cord. Synonym(s): radix (1)
2. Synonym(s): root of tooth
3. The descending underground portion of a plant; it absorbs water and nutrients, provides support, and stores nutrients.
4. Loosely used to denote the etiology of a process, event, or conflict requiring solutions to allow mitigation. For roots of pharmacologic significance that are not listed below, see specific names.
[A.S. rot]

root

(ro͞ot, ro͝ot)
n.
1. The embedded part of an organ or structure such as a hair, tooth, or nerve, that serves as a base or support.
2. A primary source; an origin; radix.

root

Australian slang for:
noun Sexual intercourse.
 
verb To engage in sexual intercourse.

root

(rūt) [TA]
1. The primary or beginning portion of any part, as of a nerve at its origin from the brainstem or spinal cord.
Synonym(s): radix (1) [TA] .
2. Synonym(s): root of tooth.
3. The descending underground portion of a plant; it absorbs water and nutrients, provides support, and stores nutrients.
[A.S. rot]
Fig. 271 Root. Transverse section of a typical dicotyledon (buttercup) root.click for a larger image
Fig. 271 Root. Transverse section of a typical dicotyledon (buttercup) root.

root

that part of a plant which (usually) grows below ground. The root provides anchorage for the aerial parts, absorbs water and mineral salts from the soil, conducts water and nutrients to other parts of the plant, and often stores food materials over winter. Root structure is variable among higher plants, but generally the root, unlike the young STEM, has a central core of conducting tissue (the STELE) which also serves as a strong structural element, assisting the root as it pushes downwards and resisting upward pressures from the aerial parts.

Roots can be classified into three main types: primary, secondary (see LATERAL ROOT), and ADVENTITIOUS (1). The primary root of ANGIOSPERMS develops from the radicle of the seedling. Later, secondary roots emerge from the top of the primary root and then further down. At the apex of the root is a protective ROOT CAP. The typical root structure of a DICOTYLEDON is shown in Fig. 271.

In MONOCOTYLEDONS the number of xylem ‘arms’ is usually much greater than in DICOTYLEDONS, 12 to 20 in monocotyledons, 2 to 5 in dicotyledons. Roots frequently undergo SECONDARY THICKENING in dicotyledons, but not in monocotyledons.

root

(rūt) [TA]
1. Primary or beginning portion of any part, as of a nerve at its origin from the brainstem or spinal cord.
2. Synonym(s): root of tooth.
3. Loosely used to denote the etiology of a process, event, or conflict requiring solutions to allow mitigation.
[A.S. rot]

Patient discussion about root

Q. How much does a root canal hurt? I have to get a root canal for my bottom tooth. I was wondering how much they hurt. And do you have any suggestions that help distract from the pain? Thanks.

A. i did one about two years ago- even the injection wasn't too bad! didn't feel a thing. but after the anesthesia worn off it hurt. but then the dentist told me to take Advil or any other NSAID and it helped.

More discussions about root
References in periodicals archive ?
from the trunk, and plant shallow-rooted perennials that don't require frequent division such as hostas, liriope and sedum.
This indicates that the shallow-rooted genotypes would have had an advantage in acquiring the limiting resource not only in the fertilized soil but also in the non-fertilized soil.
Wiebe's generalization applies best within the Arab Muslim world, "especially where," as he says, "shallow-rooted, kleptocratic states presided over impoverished Moslem populations." The appeal of Osama bin Laden's brand of Islam owes a great deal to the failure of the secular Pan-Arabism of Nasser.
Shorter, shallow-rooted grass is more susceptible to drought.
Shallow-rooted plants represent the other extreme, with many species lying in between.
Excessive application of nitrogen alone results in loose puffy heads, which cannot be stored for a long time.Cabbage is shallow-rooted and care should be taken not to damage roots in the field as this would encourage entry of fungi and bacteria.
HOES and other weeding tools are designed to remove shallow-rooted annual weeds and to cut the roots of deep-rooted perennials.
It's easy to dig underneath the root system of such shallow-rooted shrubs and the plants shouldn't have any problems re-establishing themselves in another part of the garden.
Feed shallow-rooted small or trained trees, bush and can fruits, using a general fertiliser.
``It would appear that many of those who leave school with good qualifications nevertheless have an education which is somewhat shallow-rooted; they lack valuable knowledge and understanding about their national history and heritage,'' he wrote.
Add water-retaining granules to the soil and mulch or underplant with spring bulbs or shallow-rooted plants that will keep weeds down and moisture in.
It's a shallow-rooted perennial crop which doesn't like disturbance and occupies the ground full-time, and it takes a couple of years to settle in.