What does SI stand for?

What does SI mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: SI.

We've found a total of 192 definitions for SI:

Filter by: Sort by:PopularityAlphabeticallyCategory

Acronym

Definition

Rating

SI

SAS Institute

Community » Non-Profit Organizations

Rate it:
SI

ACM Government Spectrum Fund, Inc.

Business » NYSE Symbols

Rate it:
SI

Système International d'unités (International System of Units)

Academic & Science » Ocean Science -- and more...

Rate it:
SI

Smithsonian Institute

Academic & Science » Ocean Science -- and more...

Rate it:
SI

Salt Institute

Business » Professional Organizations

Rate it:
SI

Stand-In

Community » Performing Arts

Rate it:
SI

Selectivity Index

Academic & Science » Physics

Rate it:
SI

Slight Inclusion

Academic & Science » Physics

Rate it:
SI

Self Injury

Medical » Physiology

Rate it:
SI

Self Inserted

Medical » Physiology

Rate it:
SI

Small Intestine

Medical » Physiology

Rate it:
SI

Speech Impaired

Medical » Physiology

Rate it:
SI

SacroIliac

Medical » Physiology -- and more...

Rate it:
SI

Self Inflicted

Medical » Physiology -- and more...

Rate it:
SI

Silicone

Miscellaneous » Plastics

Rate it:
SI

Sub Inspecter

Governmental » Police

Rate it:
SI

Sub Inspector

Governmental » Police

Rate it:
SI

Sub-Inspector

Governmental » Police

Rate it:
SI

Special Investigator

Business » Occupation & Positions

Rate it:
SI

Soft Intermediate

Business » Products

Rate it:
SI

Slightly Insane

Academic & Science » Psychology

Rate it:
SI

Union Pacific Railroad Company

Regional » Railroads

Rate it:
SI

Siberian Islands

Regional

Rate it:
SI

School of Information

Community » Schools

Rate it:
SI

Secure Internet

Computing » Cyber & Security

Rate it:

What does SI mean?

silicon, Si, atomic number 14(noun)
a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors

see more »

Know what is SI? Got another good explanation for SI? Don't keep it to yourself!

Still can't find the acronym definition you were looking for? Use our Power Search technology to look for more unique definitions from across the web!

Style:MLAChicagoAPA

"SI." Abbreviations.com. STANDS4 LLC, 2016. Web. 8 Dec. 2016. <http://www.abbreviations.com/SI>.