Word Study
octagon |
octagonal |
octagynous |
octahedral |
octahedrite |
octahedron
| octal
| octal digit
| octal notation
| octal number system
| octal numeration system
octahedron
WORDNET DICTIONARY
Noun octahedron has 1 sense
CIDE DICTIONARY
octahedron, n. [Gr., fr. eight-side; 'okta- (for 'oktw` eight) + seat, base, from to sit.].
A solid bounded by eight faces. The regular octahedron is contained by eight equal equilateral triangles. [1913 Webster]
OXFORD DICTIONARY
octahedron, n. (pl. octahedrons or octahedra)
1 a solid figure contained by eight (esp. triangular) plane faces.
2 a body, esp. a crystal, in the form of a regular octahedron.
1 a solid figure contained by eight (esp. triangular) plane faces.
2 a body, esp. a crystal, in the form of a regular octahedron.
Idiom
regular octahedron an octahedron contained by equal and equilateral triangles.
Derivative
octahedral adj.
Etymology
Gk oktaedron (as OCTA-, -HEDRON)
ROGET THESAURUS
octahedron
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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