se-(word root) apartExamples of words with the root se-: seduce, selectAbused, Confused, & Misused Words by Mary Embree Copyright © 2007, 2013 by Mary EmbreeSeThe symbol for selenium.SEabbr.1. a. southeastb. southeastern2. Football split end3. stock exchangeAmerican 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.se the internet domain name for (Computer Science) Sweden Se the chemical symbol for (Elements & Compounds) selenium SE symbol for (Nautical Terms) southeast(ern) Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014SE 1. southeast. 2. southeastern. 3. Standard English. Se Chem. Symbol. selenium. se- a prefix meaning ?apart,? occurring in loanwords from Latin: seduce; select. [