1.  lettuce(n = noun.possession) boodle, bread, cabbage, clams, dinero, dough, gelt, kale, lolly, loot, lucre, moolah, pelf, scratch, shekels, simoleons, sugar, wampum - informal terms for money;
is a kind of money

2.  lettuce(n = noun.plant) - any of various plants of the genus Lactuca;
is a kind of herb, herbaceous plant
is a member of genus lactuca, lactuca
has particulars: common lettuce, garden lettuce, lactuca sativa, cos lettuce, lactuca sativa longifolia, romaine lettuce, head lettuce, lactuca sativa capitata, lactuca sativa crispa, leaf lettuce, celtuce, lactuca sativa asparagina, stem lettuce

3.  lettuce(n = noun.food) - leaves of any of various plants of Lactuca sativa;
is a kind of salad green, salad greens
is a part of common lettuce, garden lettuce, lactuca sativa
has particulars: butterhead lettuce, crisphead lettuce, iceberg, iceberg lettuce, cos, cos lettuce, romaine, romaine lettuce, leaf lettuce, loose-leaf lettuce

1.  A composite plant of the genus Lactuca (Lactuca sativa), the leaves of which are used as salad. Plants of this genus yield a milky juice, from which lactucarium is obtained. The commonest wild lettuce of the United States is Lactuca Canadensis. [1913 Webster]

2.  United States currency; dollar bills; greenbacks. [PJC]

lettuce, n.
1 a composite plant, Lactuca sativa, with crisp edible leaves used in salads.
2 any of various plants resembling this.

Etymology:
ME letus(e), rel. to OF laitu{euml} f. L lactuca f. lac lactis milk, with ref. to its milky juice

N  food, eating, deglutition, gulp, epulation, mastication, manducation, rumination, gluttony, hippophagy, ichthyophagy, (appetite), mouth, jaws, mandible, mazard, gob, chops, drinking, potation, draught, libation, carousal, drunkenness, food, pabulum, aliment, nourishment, nutriment, sustenance, sustentation, sustention, nurture, subsistence, provender, corn, feed, fodder, provision, ration, keep, commons, board, commissariat, prey, forage, pasture, pasturage, fare, cheer, diet, dietary, regimen, belly timber, staff of life, bread, bread and cheese, comestibles, eatables, victuals, edibles, ingesta, grub, grubstake, prog, meat, bread, bread stuffs, cerealia, cereals, viands, cates, delicacy, dainty, creature comforts, contents of the larder, fleshpots, festal board, ambrosia, good cheer, good living, beef, bisquit, bun, cornstarch, cookie, cooky, cracker, doughnut, fatling, hardtack, hoecake, hominy, mutton, pilot bread, pork, roti, rusk, ship biscuit, veal, joint, piece de resistance, roast and boiled, remove, entremet, releve, hash, rechauffe, stew, ragout, fricassee, mince, pottage, potage, broth, soup, consomme, puree, spoonmeat, pie, pasty, volauvent, pudding, omelet, pastry, sweets, kickshaws, condiment, appetizer, hors d'oeuvre, main course, entree, alligator pear, apple, apple slump, artichoke, ashcake, griddlecake, pancake, flapjack, atole, avocado, banana, beche de mer, barbecue, beefsteak, beet root, blackberry, blancmange, bloater, bouilli, bouillon, breadfruit, chop suey, chowder, chupatty, clam, compote, damper, fish, frumenty, grapes, hasty pudding, ice cream, lettuce, mango, mangosteen, mince pie, oatmeal, oyster, pineapple, porridge, porterhouse steak, salmis, sauerkraut, sea slug, sturgeon ("Albany beef"), succotash, supawn, trepang, vanilla, waffle, walnut, table, cuisine, bill of fare, menu, table d'hote, ordinary, entree, meal, repast, feed, spread, mess, dish, plate, course, regale, regalement, refreshment, entertainment, refection, collation, picnic, feast, banquet, junket, breakfast, lunch, luncheon, dejeuner, bever, tiffin, dinner, supper, snack, junk food, fast food, whet, bait, dessert, potluck, table d'hote, dejeuner a la fourchette, hearty meal, square meal, substantial meal, full meal, blowout, light refreshment, bara, chotahazri, bara khana, mouthful, bolus, gobbet, morsel, sop, sippet, drink, beverage, liquor, broth, soup, potion, dram, draught, drench, swill, nip, sip, sup, gulp, wine, spirits, liqueur, beer, ale, malt liquor, Sir John Barleycorn, stingo, heavy wet, grog, toddy, flip, purl, punch, negus, cup, bishop, wassail, gin, coffee, chocolate, cocoa, tea, the cup that cheers but not inebriates, bock beer, lager beer, Pilsener beer, schenck beer, Brazil tea, cider, claret, ice water, mate, mint julep, near beer, 2 beer, non- alcoholic beverage, eating house, diner, hippophage, glutton, eatable, edible, esculent, comestible, alimentary, cereal, cibarious, dietetic, culinary, nutritive, nutritious, gastric, succulent, potable, potulent, bibulous, omnivorous, carnivorous, herbivorous, granivorous, graminivorous, phytivorous, ichthyivorous, omophagic, omophagous, pantophagous, phytophagous, xylophagous, across the walnuts and the wine, blessed hour of our dinners!, now good digestion wait on appetite, and health on both!, who can cloy the hungry edge of appetite?.

bibb lettuce, boston lettuce, butterhead lettuce, common lettuce, cos lettuce, crisphead lettuce, frog's lettuce, garden lettuce, head lettuce, iceberg lettuce, indian lettuce, lamb's lettuce, leaf lettuce, loose-leaf lettuce, malheur wire lettuce, miner's lettuce, prickly lettuce, romaine lettuce, sea lettuce, stem lettuce, water lettuce, white lettuce