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a combining form meaning “bud, sprout,” “embryo,” “formative cells or cell layer,” used in the formation of compound words:
Origin of -blast
< Greek, combining form of blastós a bud, sprout Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for -blast


combining form
(in biology) indicating an embryonic cell or formative layer: mesoblast
Word Origin
from Greek blastos bud
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
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-blast in Medicine

-blast suff.
An immature, embryonic stage in the development of cells or tissues: erythroblast.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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