Crossing

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crossing

1. a place, often shown by markings, lights, or poles, where a street, railway, etc., may be crossed
2. the intersection of the nave and transept in a church
3. the act or process of crossbreeding

Crossing

The square space of a cruciform church, created by the intersection of the nave and chancel with the transept. Intersection of two elements in the form of a cross, such as the ridges of a cross gable.

Crossing

 

a ventilation device installed in underground mine workings and designed to separate and isolate intersecting flows of air, such as fresh air and exhaust air. Depending on the airflow and period of service, crossings may be made of metal and concrete piping or in the form of a well-secured bypass shaft driven through the rock in the roof or soil of the bed.


Crossing

 

(also interbreeding or hybridizing), one of the methods of the selective breeding of plants and animals. Crossing is used to obtain hybrids and crossbreeds that represent the initial material in selection and culling for economically beneficial characteristics. It is also used in the development of new breeds and varieties.

The various systems of crossing can be classified in one of two categories: inbreeding and outbreeding. Variants of outbreeding include crossbreeding, incrossing (crossing inbred lines of the same breed or variety), incrossbreeding (crossing inbred lines of different breeds or varieties), topcross (crossing specially selected inbred male lines with outbred female lines), and more remote crossings. In animal breeding, crossing is understood to mean crossbreeding, which is divided into induced crossbreeding, reproductive crossing, grading up, and commercial crossbreeding. (See alsoHYBRIDIZATION.)


Crossing

 

in medieval, primarily Romanesque and Gothic, churches, the place where the nave and transept intersect.

crossing

1. In a church, the place where the nave and chancel cross the transept.
2. A painting technique whereby freshly applied paint is rebrushed at right angles to the direction of application and then rebrushed at right angles again to provide even distribution of paint over the surface.
3. Same as crossbanding.
References in periodicals archive ?
Two other Glendale rail crossings were closed in recent years, and the proposed Flower Street crossing is needed to compensate, officials said.
Conway's method recognizes that a knot can be progressively unknotted by changing selected over and under crossings.
Although Burlington Northern acknowledged in the fall of 2001 that the Pinole crossing posed an unnecessary risk, it failed to close it.
The impact of the train launched the silver Dodge Caravan through the center median crossing gate, and shot the vehicle's engine about 50 yards into a parking lot.
Its products incorporate Nestor's patented image-processing technology into intelligent, real-time solutions that promote traffic efficiency, intersection safety, and railway grade crossing monitoring.
Statistics show that a vehicle and a train collide about every 90 minutes in the United States, and collisions at grade crossings killed or seriously injured about 2,400 people in 1995.
This contract is an extension of an existing contract with FDOT where NTS is providing video monitoring equipment and services at five crossings along the South Florida Rail Corridor.
Rail CrossingGuard assists officials in assessing the safety and efficiency of highway/rail grade crossings - 24 hours a day, 7 days a week.
Studies by the National Highway Traffic Safety Administration (NHTSA) and Federal Railroad Administration (FRA) report that there are approximately 261,000 highway-rail and pedestrian crossings in the United States.
Using technology to address the potentially life threatening behavior of signal violators at rail crossings is an effective step towards improving rail crossing safety.
By purchasing additional capacity from Global Crossing, we can continue to employ the latest technology in response to the area's needs and the demands of users".
On Monday evening, Atwater Village and Glendale residents attended a community meeting at Chevy Chase Recreation Center near the rail crossing to discuss the possible closure.