petty cash(n = noun.possession) - a small fund of cash that a firm keeps for the payment of incidental expenses;
is a kind of fund, monetary fund

N  money, legal tender, money matters, money market, finance, accounts, funds, treasure, capital, stock, assets, wealth, supplies, ways and means, wherewithal, sinews of war, almighty dollar, needful, cash, mammon, dough, cabbage, money-like instruments, M, M, sum, amount, balance, balance sheet, sum total, proceeds, currency, circulating medium, specie, coin, piece, hard cash, cold cash, dollar, sterling coin, pounds shillings and pence, Ls, d, pocket, breeches pocket, purse, money in hand, cash at hand, ready money, ready cash, slug, wad wad of bills, wad of money, thick wad of bills, roll of dough, rhino, blunt, dust, mopus, tin, salt, chink, argent comptant, bottom dollar, buzzard dollar, checks, dibs, double eagle, eagle, Federal currency, fractional currency, postal currency, Federal Reserve Note, United States Note, silver certificate, gold certificate, long bit, short bit, moss, nickel, pile, pin money, quarter, red cent, roanoke, rock, seawan, seawant, thousand dollars, grand, single, one-dollar bill, two- dollar bill, five-dollar bill, fiver, fin, Lincoln, ten-dollar bill, sawbuck, twenty-dollar bill, Jackson, double sawbuck, fifty-dollar bill, hundred-dollar bill, C-note, penny, cent, Lincoln cent, indian head penny, copper, two-cent piece three-cent piece, half- dime, nickel, buffalo nickel, V nickel, dime, disme, mercury dime, quarter, two bits, half dollar, dollar, silver dollar, Eisenhower dollar, Susan B, Anthony dollar, precious metals, gold, silver, copper, bullion, ingot, nugget, petty cash, pocket money, change, small change, small coin, doit, stiver, rap, mite, farthing, sou, penny, shilling, tester, groat, guinea, rouleau, wampum, good sum, round sum, lump sum, power of money, plum, lac of rupees, major coin, crown, minor coin, monetarist, monetary theory, numismatics, chrysology, numismatist, paper money, greenback, major denomination, minor denomination, money order, postal money order, Post Office order, bank note, bond, bill, bill of exchange, order, warrant, coupon, debenture, exchequer bill, assignat, blueback, hundi, shinplaster, note, note of hand, promissory note, I O U, draft, check, cheque, back-dated check, negotiable order of withdrawal, NOW, remittance, credit, liability, drawer, drawee, obligor, obligee, moneyer, coiner, false money, bad money, base coin, flash note, slip, kite, fancy stocks, Bank of Elegance, argumentum ad crumenam, letter of credit, circulation, multiplier effect, inflation, double-digit inflation, hyperinflation, erosion of the currency, debasement of the currency, deflation, stagflation, exchange rate, rate of exchange, floating exchange rates, fixed rates, currency counter, currency exchange, bureau de change, gold-backed currency, gold standard, silver standard, bank account, savings account, checking account, money market account, NOW account, time deposit, deposit, demand deposit, super NOW account, certificate of deposit, CD, $, US$, Y, A$, Federal Reserve Bank, central bank, Federal Reserve Board, board of governors of the Federal Reserve, Treasury Department, Secret Service, mint, bureau of engraving, seigniorage, counterfeit, funny money, bogus money, (falsehood), interest, interest rate, discount rate, monetary, pecuniary, crumenal, fiscal, financial, sumptuary, numismatic, numismatical, sterling, nummary, barbarus ipse placet dummodo sit dives, but the jingling of the guinea helps the hurt that, Gelt regiert die Welt, money rules the world, money makes the world go round, nervos belli pecuniam infinitam, redet Geld so schweigt die Welt, money is the mother's milk of politics, money is the root of all evil, money isn't everything, as phony as a three-dollar bill, don't take any wooden nickels.

cash, cash account, cash advance, cash bar, cash basis, cash card, cash cow, cash crop, cash dispenser, cash equivalent, cash flow, cash in, cash in hand, cash in on, cash in one's chips, cash machine, cash on delivery, cash out, cash price, cash railway, cash register, cash surrender value, chief petty officer, cold cash, hard cash, john cash, johnny cash, pay cash, petty, petty apartheid, petty bourgeoisie, petty criticism, petty juror, petty jury, petty larceny, petty morel, petty officer, petty spurge, petty whin, ready cash, spot cash