lap

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lap

1
the area formed by the upper surface of the thighs of a seated person

lap

2
1. a rotating disc coated with fine abrasive for polishing gemstones
2. any device for holding a fine abrasive to polish materials
3. Metallurgy a defect in rolled metals caused by the folding of a fin onto the surface
4. a sheet or band of fibres, such as cotton, prepared for further processing

Lap

The length by which one piece of material overlaps another.

Lap

 

an attachment on honing and lapping machines for fine finishing (grinding and lapping) of surfaces. External cylindrical surfaces are finished using laps constructed in the form of rings with an adjustable longitudinal slit and a screw for regulating dimensions; the length of the lap should not be less than the diameter of the workpiece. Laps for grinding holes are constructed in the form of thin-walled cylinders with adjustable slits. Disk laps with grooves placed longitudinally and transversely at intervals of 12–15 mm are used for preliminary grinding of flat surfaces, and laps without grooves are used for the final finishing. For gear finishing, the laps used are also constructed in the form of gear wheels. Laps are made of cast iron, steel, copper, brass, and other materials. As a rule, the material from which the lap is made must be softer than the workpiece material.

lap

[lap]
(civil engineering)
The length by which a reinforcing bar must overlap the bar it will replace.
(materials)
An abrasive material used for lapping.
(metallurgy)
A defect caused by folding and then rolling or forging a hot metal fin or corner onto a surface without welding. Also known as fold.

lap

1. To overlap or partly cover one surface with another, as in shingling.
2. The length of the overlap, as the distance one tile extends over another.

LAP

LISP Assembly Program. The assembly language embedded into early Lisp. LAP was also used by the Liar compiler for MIT Scheme and MACLISP.

[Sammet 1969, p. 597].

LAP

(1) (Link Access Protocol) The data link protocol in an AppleTalk network. Support for the various data link types were known as ELAP (Ethernet LAP), TLAP (Token Ring LAP), FLAP (FDDI LAP) and LLAP (LocalTalk LAP).

(2) (Link Access Procedure) An ITU family of data link protocols that are subsets of HDLC, which was derived from IBM's SDLC protocol. See HDLC.

LAP-B (LAP - Balanced)
Used in X.25 networks. Multilink Procedure (MLP) is a LAP-B extension that supports multiple, simultaneous links for increased throughput.

LAP-D (LAP for the D Channel)
Used for the D channel in ISDN networks defined in the ITU Q.920 and Q.921 recommendations. See ISDN.

LAP-M (LAP for Modems)
Used in V.42 modems. Although transmission between computer and modem is asynchronous, transmission between LAP-M modems is synchronous. See V.42.

LAP-X (LAP Half-Duplex)
Used in ship-to-shore transmission.
References in classic literature ?
Louisa dropped on her knees and hid her face in her mistress's lap.
And one of the robbers saw that there was a gold ring still left on her finger, and as it was difficult to draw off, he took a hatchet and cut off her finger; but the finger sprang into the air and fell behind the great cask into my lap.
I asked, and she replied that I could put it wherever I liked for all she cared, so long as I took it out of her sight (the implication was that it had stolen on to her lap while she was looking out at the window).
He coolly curled up in Anne's lap and began to purr.
He laid himself back in his chair, and puffed out his smoke, with eyes lazily half closed, like the eyes of the pug-dog on his lap.
It put the writing-case back on the lap of the living woman.
Woodville," he said, as he softly laid my hand back on my lap, "bear with an old fellow who worships your enchanting sex.
I was so small that, in order to negotiate the pail, I sat down and gathered it into my lap.
That neglected animal takes refuge on Lady Janet's lap.
And the mother looked down in her lap, and the tears ran down over her cheeks; her head became so heavy--she had not closed her eyes for three days and nights; and now she slept, but only for a minute, when she started up and trembled with cold.
exclaimed Alice, looking about in great perplexity, as first one round head, and then the other, rolled down from her shoulder, and lay like a heavy lump in her lap.
Miss Bridget did not, however, suffer her to continue long in this doubtful situation; for having looked some time earnestly at the child, as it lay asleep in the lap of Mrs Deborah, the good lady could not forbear giving it a hearty kiss, at the same time declaring herself wonderfully pleased with its beauty and innocence.