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symbol for the element seleniumselenium
, nonmetallic chemical element; symbol Se; at. no. 34; at. wt. 78.96; m.p. 217°C;; b.p. about 685°C;; sp. gr. 4.81 at 20°C;; valence −2, +4, or +6. Selenium is directly below sulfur in Group 16 of the periodic table.
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McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.






The country code for Sweden.
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(1) (Special Edition) See iPhone SE.

(2) (Standard Edition) See Java 2.

(3) (Single Ended) The traditional type of signaling on the SCSI bus. See SCSI.

(4) See systems engineer and service engineer.

(5) (Second Edition) See Windows Second Edition.
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