Sp.abbr. Spanishsp.abbr.1. species2. specimen3. spellingAmerican 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.sp. abbreviation for pl spp1. special2. (Biology) species3. specificSp. abbreviation for 1. (Placename) Spain 2. (Peoples) Spaniard 3. (Peoples) Spanish 4. (Languages) Spanish Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014