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Definitions

American Heritage® Dictionary of the English Language, Fourth Edition

  1. n. A quadrilateral having two parallel sides.
  2. n. A small bone in the wrist, situated near the base of the index finger.

Century Dictionary and Cyclopedia

  1. n. In anthropology, a type of cranium with somewhat flattened vertex and basal region which are approximately in parallel planes.
  2. Having the shape of a trapezoid. See II., 1.
  3. n. In geometry, a plane four-sided figure having two of its opposite sides parallel, and the other two not so.
  4. n. In anatomy and zoology, the trapezoid bone, one of the bones of the wrist, so called from its shape; the second one of the distal row of carpal bones, on the radial or thumb side, between the trapezium and the magnum, in special relation with the head of the second metacarpal bone; carpale II. of the typical carpus. Also called multangulum minus, and trapezoides, trapezoideum. See cuts under Artiodactyla, pisiform, hand, and scapholunar.

Wiktionary

  1. n. geometry A (convex) quadrilateral with two (non-adjacent) parallel sides.
  2. n. anatomy The trapezoid bone of the wrist.
  3. n. geometry, UK, obsolete A convex quadrilateral with no sides parallel and no equal sides.

GNU Webster's 1913

  1. n. (Geom.) A plane four-sided figure, having two sides parallel to each other.
  2. n. (Anat.) A bone of the carpus at the base of the second metacarpal, or index finger.
  3. adj. Having the form of trapezoid; trapezoidal.
  4. adj. (Anat.) Of or pertaining to the trapezoid ligament.

WordNet 3.0

  1. n. a quadrilateral with two parallel sides
  2. n. the wrist bone between the trapezium and the capitate bones

Etymologies

  1. From Ancient Greek τραπέζιον ("irregular quadrilateral", literally "a little table") + -oid ("resembling"). (Wiktionary)
  2. New Latin trapezoīdēs, from Greek trapezoeidēs, trapezium-shaped : trapeza, table; see trapezium + -oeidēs, -oid. (American Heritage® Dictionary of the English Language, Fourth Edition)

Examples

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synonyms (5)

Words with the same meaning

  1. trapezoidal
  1. trapezium
  1. qualifier
  1. irregular
  1. quadrilateral

hypernyms (6)

Words that are more generic or abstract

  1. quadrangle
  1. quadrilateral
  1. tetragon
  1. wrist bone
  1. carpal bone
  1. carpal

same context (23)

Words that are found in similar contexts

  1. eidolon
  2. quadrilateral
  3. parallelogram
  4. shemade
  1. blowdown
  2. fiddle-faddle
  3. masterwork
  4. bullfiddle
  1. afterword
  2. wigging
  3. committment
  4. narwhale
  1. polygon
  2. holo-room
  3. Philippic
  4. diatom
  1. titanthrop
  2. mangel-wurzel
  3. confab
  4. set-piece
  1. ex-sergeant
  2. holdout
  3. solarium

reverse dictionary (12)

Words that contain this word in their definition

  1. trapezoides
  2. trapezoidal
  1. trapezoidiform
  2. contraparallelogram
  1. trapezium
  2. occipital bone
  1. median
  2. trapeziform
  1. trapezoid
  2. magnum
  1. projection
  2. scaphoid

tags (5)

Free-form, user-generated categorization

  1. polygon
  1. anatomy
  1. wrist
  1. -oid
  1. British

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‘trapezoid’ has been looked up 2341 times, loved by 3 people, added to 21 lists, commented on 1 time, and has a Scrabble score of 21.