Also found in: Thesaurus, Medical, Encyclopedia.


1. A chromosome having no homologue, especially an unpaired X chromosome.
2. A single ribosome.

mon′o·so′mic (-sō′mĭk) adj.
mon′o·so′my n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Biology) an unpaired chromosome, esp an X-chromosome in an otherwise diploid cell
monosomic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈmɒn əˌsoʊm)

1. a chromosome having no homologue, esp. an unpaired X chromosome.
2. a protein-synthetic complex involving the translation of a messenger RNA molecule by a single ribosome.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Mentioned in ?
References in periodicals archive ?
Current research focuses on optimizing experimental conditions for improved separation of monosome and polysome fractions in infected and control plant cells.
Total mRNA isolated from monosome fractions of AO-0003 treated BJAB cells was also used for DNA microarray analysis; these data were processed and are plotted in Figure 3(a).
To quantify the proportion of ribosomes in the monoribosome (monosome) and polyribosome (polysome) fractions, sucrose gradients with an EDTA-containing cushion were used to accumulate all of the different size classes of polysomes (measured as one large peak).