follow Dictionary.com

Stories We Like: Novels For Language Lovers

chromosome

[kroh-muh-sohm] /ˈkroʊ məˌsoʊm/
noun, Genetics.
1.
any of several threadlike bodies, consisting of chromatin, that carry the genes in a linear order: the human species has 23 pairs, designated 1 to 22 in order of decreasing size and X and Y for the female and male sex chromosomes respectively.
Origin
1885-1890
1885-90; chromo- + -some3
Related forms
chromosomal, adjective
chromosomally, adverb
interchromosomal, adjective
interchromosomally, adverb
nonchromosomal, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
British Dictionary definitions for nonchromosomal

chromosome

/ˈkrəʊməˌsəʊm/
noun
1.
any of the microscopic rod-shaped structures that appear in a cell nucleus during cell division, consisting of nucleoprotein arranged into units (genes) that are responsible for the transmission of hereditary characteristics See also homologous chromosomes
Derived Forms
chromosomal, adjective
chromosomally, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
Word Origin and History for nonchromosomal

chromosome

n.

1889, from German Chromosom, coined 1888 by German anatomist Wilhelm von Waldeyer-Hartz (1836-1921), from Latinized form of Greek khroma "color" (see chroma) + -some (3)). So called because the structures contain a substance that stains readily with basic dyes.

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
nonchromosomal in Medicine

chromosome chro·mo·some (krō'mə-sōm')
n.

  1. A threadlike linear strand of DNA and associated proteins in the nucleus of animal and plant cells that carries the genes and functions in the transmission of hereditary information.

  2. A circular strand of DNA in bacteria and cyanobacteria that contains the hereditary information necessary for cell life.


chro'mo·so'mal (-sō'məl) or chro'mo·so'mic (-sō'mĭk) adj.

nonchromosomal non·chro·mo·som·al (nŏn'krō-mə-sō'məl)
adj.
Not situated on or involving a chromosome.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
nonchromosomal in Science
chromosome
  (krō'mə-sōm')   

A structure in all living cells that consists of a single molecule of DNA bonded to various proteins and that carries the genes determining heredity. In all eukaryotic cells, the chromosomes occur as threadlike strands in the nucleus. During cell reproduction, these strands coil up and condense into much thicker structures that are easily viewed under a microscope. Chromosomes occur in pairs in all of the cells of eukaryotes except the reproductive cells, which have one of each chromosome, and some red blood cells (such as those of mammals) that expel their nuclei. In bacterial cells and other prokaryotes, which have no nucleus, the chromosome is a circular strand of DNA located in the cytoplasm.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Difficulty index for chromosome

Most English speakers likely know this word

Word Value for nonchromosomal

23
0
Scrabble Words With Friends

Nearby words for nonchromosomal