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 188 definitions for SI:

Sort by:PopularityAlphabeticallyCategory Filter by:
SI

United States Strategic Command Strategic Instruction

Governmental » Military

   Rate it:
SI

Smithsonian Institute

Community » Museums

   Rate it:
SI

Kennedy Space Center Support Operations Directorate

Governmental » NASA

   Rate it:
SI

International Systems of Units (ISU preferred)

Governmental » NASA

   Rate it:
SI

Scientific Instrument

Governmental » NASA

   Rate it:
SI

Solar Inertial

Governmental » NASA

   Rate it:
SI

Selectable Interface

Computing » Networking

   Rate it:
SI

Slow Import

Computing » Networking

   Rate it:
SI

SAS Institute

Community » Non-Profit Organizations

   Rate it:
SI

ACM Government Spectrum Fund, Inc.

Business » NYSE Symbols

   Rate it:
SI

Smithsonian Institute

Academic & Science » Ocean Science

   Rate it:
SI

Système International d'unités (International System of Units)

Academic & Science » Ocean Science

   Rate it:
SI

Salt Institute

Business » Professional Organizations

   Rate it:
SI

Stand-In

Community » Performing Arts

   Rate it:
SI

Système International d'unités (International System of Units)

Academic & Science » Physics

   Rate it:
SI

Selectivity Index

Academic & Science » Physics

   Rate it:
SI

Slight Inclusion

Academic & Science » Physics

   Rate it:
SI

Speech Impaired

Medical » Physiology

   Rate it:
SI

SacroIliac

Medical » Physiology

   Rate it:
SI

Self Inflicted

Medical » Physiology

   Rate it:
SI

Self Inserted

Medical » Physiology

   Rate it:
SI

Small Intestine

Medical » Physiology

   Rate it:
SI

Self Injury

Medical » Physiology

   Rate it:
SI

Silicone

Miscellaneous » Plastics

   Rate it:
SI

Sub Inspector

Governmental » Police

   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 on Definitions.net »

Know another definition for SI? Know what SI means? 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, 2015. Web. 27 Jan. 2015. <http://www.abbreviations.com/SI>.


The Web's Largest Resource for

Acronyms & Abbreviations


A Member Of The STANDS4 Network