Etymology
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Words related to lap

label (n.)
c. 1300, "narrow band or strip of cloth" (oldest use is as a technical term in heraldry), from Old French label, lambel, labeau "ribbon, fringe worn on clothes" (13c., Modern French lambeau "strip, rag, shred, tatter"). This is perhaps, with a diminutive suffix, from Frankish *labba or some other Germanic source (such as Old High German lappa "flap"), from Proto-Germanic *lapp-, forming words for loose cloth, etc. (see lap (n.1)).

Meanings "dangling strip of cloth or ribbon used as an ornament in dress," also "strip attached to a document to hold a seal" both are from early 15c. General meaning "tag, sticker, slip of paper" affixed to something to indicate its nature, contents, destination, etc. is from 1670s. Hence "circular piece of paper in the center of a gramophone record," containing information about the recorded music (1907), which led to the meaning "a recording company" (1947).
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lampoon (n.)
"A personal satire; abuse; censure written not to reform but to vex" [Johnson], 1640s, from French lampon (17c.), a word of unknown origin, said by French etymologists to be from lampons "let us drink," which is said to have been a popular refrain for scurrilous songs, in which case it would be originally a drinking song. French lampons is from lamper "to drink, guzzle," a nasalized form of laper "to lap," from a Germanic source akin to lap (v.). Also see -oon.
lapdog (n.)

also lap-dog, 1640s, "small dog fondled in the lap," from lap (n.1) + dog (n.); figurative sense of "subservient person" is by 1950.

Senator McCarthy (R-Wis) renewed his Communists-in-Government charges today and called Senator Tydings (D-Md) the Truman administration's "whimpering lap dog." [AP news story, Aug. 7, 1950]
lapful (n.)
1610s, from lap (n.1) + -ful. In old slang, "a lover or husband," also "an unborn child."
lappet (n.)
"a small flap," 1570s; earlier "lobe of a body part" (early 15c.), from Middle English lappe "lap" (see lap (n.1)) + -et, diminutive suffix.
laptop 
also lap-top, in reference to a type of portable computer, 1983 (adjective and noun), from lap (n.1) + top (n.1), on model of desktop.
lobe (n.)
early 15c., "a lobe of the liver or lungs," from Medieval Latin lobus "a lobe," from Late Latin lobus "hull, husk, pod," from Greek lobos "lobe, lap, slip; vegetable pod," used of lap- or slip-like parts of the body or plants, especially "earlobe," but also of lobes of the liver or lungs, a word of unknown origin. It is perhaps related to Greek leberis "husk of fruits," from PIE *logwos. Beekes writes that the proposed connection with the PIE source of English lap (n.1)) "is semantically attractive." Extended 1670s to divisions of the brain; 1889 to ice sheets. The common notion is "rounded protruding part."
lop (v.2)
"droop, hang loosely," as do the ears of certain dogs and rabbits, 1570s, probably a variant of lob or of lap (v.); compare lopsided (1711), which in early use also was lapsided. Lop-eared attested from 1680s. Related: Lopped; lopping.
overlap (v.)

"to lap or fold over, to partially extend over, extend so as to rest or lie upon," 1726; see over- + lap (v.2). Verbal phrase lap over "extend beyond" is recorded from 1630s. Related: Overlapped; overlapping.

wrap (v.)
early 14c., wrappen, "to wind (something around something else), cover (something), conceal; bind up, swaddle; fold (something) up or back on itself," of uncertain origin, perhaps via Scandinavian (compare Danish dialectal vravle "to wind"), from PIE *werp- "to turn, wind," from root *wer- (2) "to turn, bend." Or perhaps a variant of lap (v.2). To wrap up "put an end to" is from 1926. Related: Wrapped; wrapping. Wrapping paper is from 1715.