A polyhedron having a polygonal base and triangular sides with a common vertex.

Roget 72: assemblage; collection, collocation, colligation^†; compilation, levy, gathering, ingathering, muster, attroupement^†; team; concourse, conflux^†, congregation, contesseration^†, convergence etc. 290; meeting, levee, reunion, drawing room, at home; conversazione [It] etc. (social gathering) 892; assembly, congress; convention, conventicle; gemote^†; conclave etc. (council) 696; posse, posse comitatus [Lat.]; Noah's ark.    miscellany, collectanea^†; museum, menagerie etc. (store) 636; museology^†.    crowd, throng, group; flood, rush, deluge; rabble, mob, press, crush, cohue^†, horde, body, tribe; crew, gang, knot, squad, band, party; swarm, shoal, school, covey, flock, herd, drove; atajo^†; bunch, drive, force, mulada [U.S.]; remuda^†; roundup [U.S.]; array, bevy, galaxy; corps, company, troop, troupe, task force; army, regiment etc. (combatants) 726; host etc. (multitude) 102; populousness.    clan, brotherhood, fraternity, sorority, association etc. (party) 712.    volley, shower, storm, cloud.    group, cluster, Pleiades, clump, pencil; set, batch, lot, pack; budget, assortment, bunch; parcel; packet, package; bundle, fascine^†, fasces^†, bale; seron^†, seroon^†; fagot, wisp, truss, tuft; shock, rick, fardel^†, stack, sheaf, haycock^†; fascicle, fascicule^†, fasciculus [Lat.], gavel, hattock^†, stook^†.    accumulation etc. (store) 636; congeries, heap, lump, pile, rouleau^†, tissue, mass, pyramid; bing^†; drift; snowball, snowdrift; acervation^†, cumulation; glomeration^†, agglomeration; conglobation^†; conglomeration, conglomerate; coacervate [Chem], coacervation [Chem], coagmentation^†, aggregation, concentration, congestion, omnium gaterum [Lat.], spicilegium^†, black hole of Calcutta; quantity etc. (greatness) 31.    collector, gatherer; whip, whipper in.    ... show more

Roget 244: angularity, angularness^†; aduncity^†; angle, cusp, bend; fold etc. 258; notch etc. 257; fork, bifurcation.    elbow, knee, knuckle, ankle, groin, crotch, crutch, crane, fluke, scythe, sickle, zigzag, kimbo^†, akimbo.    corner, nook, recess, niche, oriel [Arch.], coign^†.    right angle etc. (perpendicular) 216.1, 212; obliquity etc. 217; angle of 45 degrees, miter; acute angle, obtuse angle, salient angle, reentering angle, spherical angle.    angular measurement, angular elevation, angular distance, angular velocity; trigonometry, goniometry; altimetry^†; clinometer, graphometer^†, goniometer; theodolite; sextant, quadrant; dichotomy.    triangle, trigon^†, wedge; rectangle, square, lozenge, diamond; rhomb, rhombus; quadrangle, quadrilateral; parallelogram; quadrature; polygon, pentagon, hexagon, heptagon, octagon, oxygon^†, decagon.    pyramid, cone.    Platonic bodies; cube, rhomboid; tetrahedron, pentahedron, hexahedron, octahedron, dodecahedron, icosahedron, eicosahedron; prism, pyramid; parallelopiped; curb roof, gambrel roof, mansard roof.    ... show more

Roget 253: sharpness etc. adj.; acuity, acumination^†; spinosity^†.    point, spike, spine, spicule [Biol.], spiculum^†; needle, hypodermic needle, tack, nail, pin; prick, prickle; spur, rowel, barb; spit, cusp; horn, antler; snag; tag thorn, bristle; Adam's needle^†, bear grass [U.S.], tine, yucca.    nib, tooth, tusk; spoke, cog, ratchet.    crag, crest, arete [Fr.], cone peak, sugar loaf, pike, aiguille^†; spire, pyramid, steeple.    beard, chevaux de frise [Fr.], porcupine, hedgehog, brier, bramble, thistle; comb; awn, beggar's lice, bur, burr, catchweed^†, cleavers, clivers^†, goose, grass, hairif^†, hariff, flax comb, hackle, hatchel^†, heckle.    wedge; knife edge, cutting edge; blade, edge tool, cutlery, knife, penknife, whittle, razor, razor blade, safety razor, straight razor, electric razor; scalpel; bistoury^†, lancet; plowshare, coulter, colter^†; hatchet, ax, pickax, mattock, pick, adze, gill; billhook, cleaver, cutter; scythe, sickle; scissors, shears, pruning shears, cutters, wire cutters, nail clipper, paper cutter; sword etc. (arms) 727; bodkin etc. (perforator) 262; belduque^†, bowie knife^†, paring knife; bushwhacker [U.S.]; drawing knife, drawing shave; microtome [Micro.]; chisel, screwdriver blade; flint blade; guillotine.    sharpener, hone, strop; grindstone, whetstone; novaculite^†; steel, emery.    ... show more

Roget 363: interment, burial, sepulture^†; inhumation^†; obsequies, exequies^†; funeral, wake, pyre, funeral pile; cremation.    funeral, funeral rite, funeral solemnity; kneel, passing bell, tolling; dirge etc. (lamentation) 839; cypress; orbit, dead march, muffled drum; mortuary, undertaker, mute; elegy; funeral, funeral oration, funeral sermon; epitaph.    graveclothes^†, shroud, winding sheet, cerecloth; cerement.    coffin, shell, sarcophagus, urn, pall, bier, hearse, catafalque, cinerary urn^†.    grave, pit, sepulcher, tomb, vault, crypt, catacomb, mausoleum, Golgotha, house of death, narrow house; cemetery, necropolis; burial place, burial ground; grave yard, church yard; God's acre; tope, cromlech, barrow, tumulus, cairn; ossuary; bone house, charnel house, dead house; morgue; lich gate^†; burning ghat^†; crematorium, crematory; dokhma^†, mastaba^†, potter's field, stupa^†, Tower of Silence.    sexton, gravedigger.    monument, cenotaph, shrine; grave stone, head stone, tomb stone; memento mori [Lat.]; hatchment^†, stone; obelisk, pyramid.    exhumation, disinterment; necropsy, autopsy, post mortem examination [Lat.]; zoothapsis^†.    ... show more

Dutch: viervlak
Polish: ostrosłup

stock market A series of transactions in which the speculator increases his holdings by using the rising market value of those holdings as margin for further purchases.

A massive monument with a square base and four triangular sides; begun by Cheops around 2700 BC as royal tombs in ancient Egypt.

synonyms: Great Pyramid, Pyramids of Egypt.

Dutch: piramide

Enlarge one's holdings on an exchange on a continued rise by using paper profits as margin to buy additional amounts.

Use or deal in (as of stock or commercial transaction) in a pyramid deal.

Arrange or build up as if on the base of a pyramid.

Increase rapidly and progressively step by step on a broad base.