-blasticsuff. Having a specified number or kind of formative elements such as buds, germs, cells, or cell layers: meroblastic.[From -blast.]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.-blastic a combining form meaning ?having a given type or number of buds, cells, or cell layers,? or ?undergoing a given type of development?: holoblastic. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.