A positively charged baryon containing a charm quark and having a mass 4,473 times that of the electron and a mean lifetime of about 2 × 10-15 second. Also called charmed lambda baryon.
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.