Word Study
Pentagon
WORDNET DICTIONARY
Noun Pentagon has 3 senses
- pentagon(n = noun.artifact) Array - a government building with five sides that serves as the headquarters of the United States Department of Defense; Array is a kind of government building
- pentagon(n = noun.group) Array - the United States military establishment; Array is a kind of bureaucracy, bureaucratism
- pentagon(n = noun.shape) Array - a five-sided polygon; Array is a kind of polygon, polygonal shape
CIDE DICTIONARY
Pentagon, n. [Gr. penta`gwnon; penta- (see Penta-) + gwni`a angle: cf. L. pentagonium, F. pentagone.].
A plane figure having five angles, and, consequently, five sides; any figure having five angles. [1913 Webster]
OXFORD DICTIONARY
Pentagon, n.
1 a plane figure with five sides and angles.
2 (the Pentagon) a the pentagonal Washington headquarters of the US defence forces. b the leaders of the US defence forces.
1 a plane figure with five sides and angles.
2 (the Pentagon) a the pentagonal Washington headquarters of the US defence forces. b the leaders of the US defence forces.
Derivative
pentagonal adj.
Etymology
F pentagone or f. LL pentagonus f. Gk pentagonon (as PENTA-, -GON)
ROGET THESAURUS
Pentagon
Angularity
N angularity, angularness, aduncity, angle, cusp, bend, fold, notch, fork, bifurcation, elbow, knee, knuckle, ankle, groin, crotch, crutch, crane, fluke, scythe, sickle, zigzag, kimbo, akimbo, corner, nook, recess, niche, oriel, coign, right angle, obliquity, 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, angular, bent, crooked, aduncous, uncinated, aquiline, jagged, serrated, falciform, falcated, furcated, forked, bifurcate, zigzag, furcular, hooked, dovetailed, knock kneed, crinkled, akimbo, kimbo, geniculated, oblique, fusiform, wedge-shaped, cuneiform, cuneate, multangular, oxygonal, triangular, trigonal, trilateral, quadrangular, quadrilateral, foursquare, rectangular, square, multilateral, polygonal, cubical, rhomboid, rhomboidal, pyramidal.
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