trapezium

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trapezium •columbium •erbium, terbium, ytterbium •scandium • compendium •palladium, radium, stadium, vanadium •medium, tedium •cryptosporidium, cymbidium, idiom, iridium, rubidium •indium •exordium, Gordium, rutherfordium •odeum, odium, plasmodium, podium, sodium •allium, gallium, pallium, thallium, valium •berkelium, epithelium, helium, nobelium, Sealyham •beryllium, cilium, psyllium, trillium •linoleum, petroleum •thulium • cadmium •epithalamium, prothalamium •gelsemium, premium •chromium, encomium •holmium • fermium •biennium, millennium •cranium, geranium, germanium, Herculaneum, titanium, uranium •helenium, proscenium, rhenium, ruthenium, selenium •actinium, aluminium, condominium, delphinium •ammonium, euphonium, harmonium, pandemonium, pelargonium, plutonium, polonium, zirconium •neptunium •europium, opium •aquarium, armamentarium, barium, caldarium, cinerarium, columbarium, dolphinarium, frigidarium, herbarium, honorarium, planetarium, rosarium, sanitarium, solarium, sudarium, tepidarium, terrarium, vivarium •atrium •delirium, Miriam •equilibrium, Librium •yttrium •auditorium, ciborium, conservatorium, crematorium, emporium, moratorium, sanatorium, scriptorium, sudatorium, vomitorium •opprobrium •cerium, imperium, magisterium •curium, tellurium •potassium • axiom • calcium •francium • lawrencium • americium •Latium, solatium •lutetium, technetium •Byzantium • strontium • consortium •protium • promethium • lithium •alluvium, effluvium •requiem • colloquium • gymnasium •caesium (US cesium), magnesium, trapezium •Elysium • symposium

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tra·pe·zi·um / trəˈpēzēəm/ • n. (pl. -zi·a / -zēə/ or -zi·ums ) 1. Geom. a type of quadrilateral: ∎  a quadrilateral with no sides parallel. Compare with trapezoid. ∎ Brit. a quadrilateral with one pair of sides parallel. 2. (also os trapezium) Anat. a bone in the wrist below the base of the thumb.

trapezium

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trapezium (geom.) irregular quadrilateral XVI; quadrilateral having only one pair of opposite sides parallel XVII. — late L. — Gr. trapézion, f. trápeza table, for *tetra-peza, f. TETRA- + IE. *ped- FOOT.
So trapezoid quadrilateral no two sides of which are parallel. XVIII. — modL. trapezoidēs — late Gr. trapezoeidés.

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Tra·pe·zi·um / trəˈpēzēəm/ (the Trapezium) Astron. the multiple star Theta Orionis, which lies within the Great Nebula of Orion and illuminates it. Four stars are visible in a small telescope and two more with a larger telescope.

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trapezium (tră-pee-ziŭm) n. a bone of the wrist (see carpus). It articulates with the scaphoid bone behind, with the first metacarpal in front, and with the trapezoid and second metatarsal on either side.