Se


Symbol, Chemistry.

Definition for se (2 of 3)

Definition for se (3 of 3)

se-

a prefix occurring in loanwords from Latin, where it meant “apart”: seduce; select.

Origin of se-

< Latin sē(d) (preposition), sē- (prefix) without, apart
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for se

British Dictionary definitions for se (1 of 3)

se

the internet domain name for

Sweden

British Dictionary definitions for se (2 of 3)

Se

the chemical symbol for

selenium

British Dictionary definitions for se (3 of 3)

SE

symbol for

southeast(ern)

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

Medicine definitions for se

Se

The symbol for the elementselenium

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

Science definitions for se (1 of 2)

Se

The symbol for selenium.

Science definitions for se (2 of 2)

selenium

[ sĭ-lēnē-əm ]

Se

A nonmetallic element that occurs in a gray crystalline form, as a red powder, or as a black glassy material. It is highly photosensitive and can be used to convert light into electricity. Its ability to conduct electricity also increases with higher exposure to light. For these reasons selenium is used in photocopying technology, photography, and solar cells. Atomic number 34; atomic weight 78.96; melting point 217°C; boiling point 684.9°C; specific gravity (gray) 4.79; (red) 4.5; (black) 4.28; valence 2, 4, or 6. See Periodic Table.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.