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Intermediate in flow properties between solids and liquids; highly viscous.
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.
(General Physics) having properties between those of a liquid and those of a solid
(General Physics) a substance that has such properties because of high viscosity: tar is a semifluid.
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
sem•i•flu•id(ˌsɛm iˈflu ɪd, ˌsɛm aɪ-)
1. having both fluid and solid characteristics; semiliquid.n.
2. Also called semiliquid. a semifluid substance.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.