header


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header

1. a reservoir, tank, or hopper that maintains a gravity feed or a static fluid pressure in an apparatus
2. a manifold for distributing a fluid supply amongst a number of passages
3. a machine that trims the heads from castings, forgings, etc., or one that forms heads, as in wire, to make nails
4. a person who operates such a machine
5. the action of striking a ball with the head
6. Computing a block of data on a tape or disk providing information about the size, location, etc., of a file

Header

A masonry unit laid so that its short end is parallel to the face, overlapping two adjacent widths of masonry; a framing member supporting the ends of joists, transferring the weight of the latter to parallel joists and rafters.

Header

 

the cutting unit of a grain-harvesting combine. It cuts the stalks and feeds them on a conveyor to the thresher.

header

[′hed·ər]
(building construction)
A framing beam positioned between trimmers and supported at each end by a tail beam.
(civil engineering)
Brick or stone laid in a wall with its narrow end facing the wall.
(communications)
The first section of a message, which contains information such as the addressee, routing, data, and origination time.
(computer science)
(electricity)
A mounting plate through which the insulated terminals or leads are brought out from a hermetically sealed relay, transformer, transistor, tube, or other device.
(engineering)
A pipe, conduit, or chamber which distributes fluid from a series of smaller pipes or conduits; an example is a manifold.
(graphic arts)
Text that is printed at the top of every page of a document or report; may contain the page number.
(mechanical engineering)
A machine used for gathering or upsetting materials; used for screw, rivet, and bolt heads.
(mining engineering)
An entry-boring machine that bores the entire section of the entry in one operation.
A rock that heads off or delays progress.
A blasthole at or above the head.

header

1. A masonry unit, laid so that its ends are exposed, overlapping two or more adjacent withes of masonry and tying them together; a bondstone; a bonder.
3. A framing member which crosses and supports the ends of joists, rafters, etc., transferring the weight of the latter to parallel joists, rafters, etc.
4. In plumbing, a pipe having many outlets which are parallel and frequently at 90° to the center line of the pipe.
5. A chamber into which a number of pipes open.
7. A transverse raceway for electrical conductors which provides access to a cellular floor, thereby permitting the convenient installation of electrical conductors.
8. The structural member immediately over a door opening.

header joist, header, lintel, trimmer joist

header joist
header, 3
header, 1
A short structural member (as used in framing an opening) which is fastened between parallel full-length framing members at right angles to

header

(1)
The portion of a packet, preceding the actual data, containing source and destination addresses, error checking and other fields.

header

(2)
The part of an electronic mail message or news article that precedes the body of a message and contains, among other things, the sender's name and e-mail address and the date and time the message was sent.

header

(1) In a disk or tape file, a set of data that resides permanently at the beginning. It may be used for identification only (type of file, date of last update, etc.), or it may describe the structural layout of the contents, as is common with many document and database formats.

(2) In a document or report, common text printed at the top of every page.

(3) Any caption or description used as a headline.

(4) In communications and networking, a group of fields added to the beginning of the message or packet. The fields typically include source and destination addresses as well as data that describe the message content. See HTTP header, e-mail header and header file.
References in periodicals archive ?
out,i] was determined by the pressure in the header Pave (estimated as the average of subcooled and superheated pressures) and the outlet enthalpy from the header i.
The Heed were booed off at half-time after former Chester-field forward Scott Boden had struck twice, but hit back through second-half headers from defender Carl Magnay and substitute Liam Hatch.
025') terminal, includes 8-, 12-, 16- and 20-circuit connectors in both vertical and right-angle headers supporting low-level signal requirements.
But worryingly, Boro have also shipped six from headers - over a quarter of their 23 goals leaked so far.
But Dorman wrapped it up with another header from Miranda's cross.
The best chance fell to Baird on the hour but his downward header was superbly tipped wide by Scott Black.
Filtering systems "read" mail, check IP addresses, check domain names, check e-mail addresses, look at headers, look for specific text or phrases, use point systems, and so on.
Under the Hot header on the homepage, visitors will find links to RNAi research published in the past month.
The giant Lawrence gave them the lead with a header and then Llewellyn also rose to the occasion to make it 2-0 with another header to sink Albion.
I am sending this email to highlight an offensive article header used in the November 22nd edition, and to request that you be vigilent about this in the future.
The rebuild included replacement of the tapered header with a Radial Tower header equipped with an MD pulsation attenuator and dilution profiling with 80mm profiling zones and replacement of the rear wall of the headbox.