corona

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corona

 [kŏ-ro´nah] (pl. coro´nae, coronas) (L.)
crown; in anatomic nomenclature, an eminence or encircling structure that resembles a crown. adj., adj cor´onal.
corona radia´ta
1. the radiating crown of projection fibers passing from the internal capsule to every part of the cerebral cortex.
2. an investing layer of radially elongated follicle cells surrounding the zona pellucida of the ovum; it accompanies the oocyte during ovulation.

crown

(krown), [TA]
1. Any structure, normal or pathologic, resembling or suggesting a crown or a wreath.
2. In dentistry, that part of a tooth that is covered with enamel. Synonym(s): corona [TA]
3. An artificial substitute for the part of a tooth that is normally covered with enamel.
[L. corona]

corona

(kə-rō′nə)
n. pl. coro·nas or coro·nae (-nē)
1. Astronomy
a. A faintly colored luminous ring or halo appearing to surround a celestial body when viewed through a haze or thin cloud, especially such a ring around the moon or sun, caused by scattering or diffraction of light from suspended particulate matter in the intervening medium. Also called aureole.
b. The luminous irregular envelope of extremely hot and highly ionized gas located outside the chromosphere of the sun.
2. Architecture An overhanging part near the top of a classical cornice, having a flat outer face.
3. A cigar with a long tapering body and blunt ends.
4. Anatomy The crownlike upper portion of a bodily part or structure, such as the top of the head.
5. Botany A crown-shaped, funnel-shaped, or trumpet-shaped outgrowth or appendage of the perianth of certain flowers, such as a daffodil. Also called crown.
6. Electricity A faint glow enveloping the high-field electrode in a corona discharge, often accompanied by streamers directed toward the low-field electrode.

corona of penis

A ridge of skin separating the penis head from the shaft, which corresponds to the “trailing” edge of the head.

crown

(krown)
1. Any structure, normal or pathologic, resembling or suggesting a crown or a wreath.
2. dentistry That part of a tooth that is covered with enamel, or an artificial substitute for that part.
Synonym(s): corona [TA] .
[L. corona]

corona

Any structure resembling a crown.

corona

a trumpet-shaped outgrowth of the PERIANTH, as in daffodil flowers.

crown

(krown)
1. [TA] In dentistry, that part of a tooth that is covered with enamel.
2. An artificial substitute for the part of a tooth that is normally covered with enamel.
[L. corona]
References in periodicals archive ?
To investigate the effect of CDAP on onion decay in low-temperature storage conditions, onion was stored at 0[degrees]C in a cold storage room (50.4 [m.sup.3] in dimension) for 10 months with corona discharge air plasma treatment at [O.sub.3] concentration of 5 ppm for 6 hours every day.
Zhang, "Effects of geometrical parameters of two height-unequal adjacent objects on corona discharges from their tips during a thunderstorm," Atmospheric Research, vol.
The tested power transmission line arrangement was subjected to very intensive corona discharges that usually do not occur during normal operation of the power lines (e.g., operation at 90% of the line breakdown voltage), but on the other hand, the tests were performed under very favorable climate conditions--constant temperature of 23[degrees]C and relative humidity equal to approx.
In order to assess the effect of height of rods on the possibility of corona discharge development from them distributions of the EF at different heights of rods were calculated.
The optophysic treatment is a technique that involves exposing the ABS surface sequentially to a corona discharge electrode of 20 kV and to UV rays from a 125 W mercury lamp (Fig.
To get a corona discharge a needle with high potential, a grounded ring, PVC pipe and a high-voltage source are needed (Fig.
Recent research studies in the field of anodization methods of aluminum were directed toward alternative methods for the generation of alumina layers, namely, corona discharge treatments [2].
The study presented in this paper focuses on corona discharge in different insulating oils.
Electrical stress results primarily from corona discharge (when the voltage gradient exceeds critical value), leakage current from the line and arcing or flashover discharge from the line to the support structure.
[10] carried out corona discharge studies in [LN.sub.2] and have observed vapor bubble formation near the high divergent electric field zone initiating multiple discharges in the bubbles formed.
Only corona discharge was mentioned to be detected in transmission lines.
Figure 2 shows the variation in corona discharge inception voltage initiated due to 0.1 N N[H.sub.4]Cl water droplet of different conductivity on gamma irradiated specimen.