Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Double or twofold.
  • adj. Genetics Having a pair of each type of chromosome, so that the basic chromosome number is doubled: diploid somatic cells.
  • n. Genetics An organism or cell having diploid cells.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Of a cell, having a pair of each type of chromosome, one of the pair being derived from the ovum and the other from the spermatozoon. Most somatic cells of higher organisms are diploid.
  • n. A cell which is diploid.
  • n. An organism with diploid cells.

from the GNU version of the Collaborative International Dictionary of English

  • adj. having a number of chromosomes corresponding to two copies of each chromosome; having double the basic number of chromosomes, as seen in a haploid cell. Contrasted to haploid and polyploid.
  • n. A solid bounded by twenty-four similar quadrilateral faces. It is a hemihedral form of the hexoctahedron.
  • n. a cell or organism having a number of chromosomes corresponding to two copies of each chromosome; a diploid cell or organism.

from The Century Dictionary and Cyclopedia

  • n. In crystallography, a solid belonging to the isometric system, with 24 trapezoidal planes. It is the parallel-hemihedral form of the hexoctahedron. Also called dyakis-dodecahedron.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. of a cell or organism having two sets of chromosomes or twice the haploid number
  • n. (genetics) an organism or cell having the normal amount of DNA per cell; i.e., two sets of chromosomes or twice the haploid number

Etymologies

Greek diplous, double; see dwo- in Indo-European roots + -oid.
(American Heritage® Dictionary of the English Language, Fourth Edition)

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