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What (who) is closely packed column - definition

Packed column; Packed bed reactor

column

Examples of Egyptian columns

Examples of columns

Different columns

STRUCTURAL ELEMENT SUSTAINING THE WEIGHT OF A BUILDING

Columns; Base (architecture); Pillars; Collumn; Structural column; Architectural Columns; Column (architecture); Wikipedia talk:Articles for creation/Coloumn; Column drum; Y-column; Y-shaped column; Pillar; Pillar (architecture)

(columns)

Frequency: The word is one of the 3000 most common words in English.

1.

A column is a tall, often decorated cylinder of stone which is built to honour someone or forms part of a building.

...a London landmark, Nelson's Column in Trafalgar Square.

= pillar

N-COUNT

2.

A column is something that has a tall narrow shape.

The explosion sent a column of smoke thousands of feet into the air.

N-COUNT: usu N of n

3.

A column is a group of people or animals which moves in a long line.

There were reports of columns of military vehicles appearing on the streets.

N-COUNT: usu N of n

4.

On a printed page such as a page of a dictionary, newspaper, or printed chart, a column is one of two or more vertical sections which are read downwards.

We had stupidly been looking at the wrong column of figures...

N-COUNT

5.

In a newspaper or magazine, a column is a section that is always written by the same person or is always about the same topic.

She also writes a regular column for the Times Educational Supplement.

N-COUNT: usu supp N

6.

see also agony column
, gossip column
, personal column
, spinal column
, steering column

column

Examples of Egyptian columns

Examples of columns

Different columns

STRUCTURAL ELEMENT SUSTAINING THE WEIGHT OF A BUILDING

Columns; Base (architecture); Pillars; Collumn; Structural column; Architectural Columns; Column (architecture); Wikipedia talk:Articles for creation/Coloumn; Column drum; Y-column; Y-shaped column; Pillar; Pillar (architecture)

¦ noun

1. an upright pillar supporting an arch or other structure or standing alone as a monument.

an upright shaft used for controlling a machine.

2. a vertical division of a page or text.

a regular section of a newspaper or magazine on a particular subject or by a particular person.

3. a line of people or vehicles moving in the same direction.

Military a narrow-fronted deep formation of troops in successive lines.

Derivatives

columnar adjective

columned adjective

Origin

ME: partly from OFr. columpne, reinforced by its source, L. columna 'pillar'.

column

Examples of Egyptian columns

Examples of columns

Different columns

STRUCTURAL ELEMENT SUSTAINING THE WEIGHT OF A BUILDING

Columns; Base (architecture); Pillars; Collumn; Structural column; Architectural Columns; Column (architecture); Wikipedia talk:Articles for creation/Coloumn; Column drum; Y-column; Y-shaped column; Pillar; Pillar (architecture)

n.

series of articles

1) a syndicated column (in a newspaper)

vertical division of a page

2) advertising (esp. BE) columns; correspondence (esp. BE) columns; a personal; society; sports column

list of numbers

3) to add up a column

shaft

4) a steering column (on a car)

5) (med.) the spinal, vertebral column

row

6) a tank column

misc.

7) a fifth column ('enemy supporters behind one's own lines')

Wikipedia

Packed bed

In chemical processing, a packed bed is a hollow tube, pipe, or other vessel that is filled with a packing material. The packing can be randomly filled with small objects like Raschig rings or else it can be a specifically designed structured packing. Packed beds may also contain catalyst particles or adsorbents such as zeolite pellets, granular activated carbon, etc.

The purpose of a packed bed is typically to improve contact between two phases in a chemical or similar process. Packed beds can be used in a chemical reactor, a distillation process, or a scrubber, but packed beds have also been used to store heat in chemical plants. In this case, hot gases are allowed to escape through a vessel that is packed with a refractory material until the packing is hot. Air or other cool gas is then fed back to the plant through the hot bed, thereby pre-heating the air or gas feed.

https://en.wikipedia.org/wiki/Packed bed