[ rahy-buh-sohm ]
/ ˈraɪ bəˌsoʊm /
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noun Cell Biology.
a tiny, somewhat mitten-shaped organelle occurring in great numbers in the cell cytoplasm either freely, in small clusters, or attached to the outer surfaces of endoplasmic reticula, and functioning as the site of protein manufacture.
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“Was” is used for the indicative past tense of “to be,” and “were” is only used for the subjunctive past tense.
OTHER WORDS FROM ribosomeri·bo·so·mal, adjective
Words nearby ribosome
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
Example sentences from the Web for ribosome
Then, the RNA brings these instructions to the ribosome, which “reads” them.
British Dictionary definitions for ribosome
/ (ˈraɪbəˌsəʊm) /
any of numerous minute particles in the cytoplasm of cells, either free or attached to the endoplasmic reticulum, that contain RNA and protein and are the site of protein synthesis
Derived forms of ribosomeribosomal, adjective
Word Origin for ribosome
C20: from ribo (nucleic acid) + -some ³
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
Medical definitions for ribosome
[ rī′bə-sōm′ ]
A minute round cytoplasmic particle composed of RNA and protein that is the site of protein synthesis as directed by mRNA.
Other words from ribosomeri′bo•so′mal (-sō′məl) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Scientific definitions for ribosome
[ rī′bə-sōm′ ]
A sphere-shaped structure within the cytoplasm of a cell that is composed of RNA and protein and is the site of protein synthesis. Ribosomes are free in the cytoplasm and often attached to the membrane of the endoplasmic reticulum. Ribosomes exist in both eukaryotic and prokaryotic cells. Plastids and mitochondria in eukaryotic cells have smaller ribosomes similar to those of prokaryotes. See more at cell.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Cultural definitions for ribosome
[ (reye-buh-sohm) ]
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.