| Term | Full Form | Definition | Meaning | Main Category | Subcategory | Country/ Region | Popularity |
|---|---|---|---|---|---|
| s | second | Academic & Science › Units |  |
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| S | South | Academic & Science › Language & Linguistics | |
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| S | Sulfur | Academic & Science › Chemistry | |
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| S | Entropy | Academic & Science › Physics | |
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| S | Siemens | Academic & Science › Units | |
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| S | Spin | Academic & Science › Physics | |
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| S | Serine | Medical › Biochemistry | |
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| S | Socialdemokraterna | Governmental › Politics |  |
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| S | Small | Society & Culture › Fashion & Lifestyle | |
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| S | Sheffield | Regional › Postal |  |
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| s | strikethrough | Computing › Programming & Development | |
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| S | Sonder | Technology › Automotive | |
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| S | Sport | Technology › Automotive | |
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| S | Synthesis | Medical › Genetics | |
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| S | Shrirangapattana | Transport & Travel › IRCTC Station Codes |  |
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| S-Video | Separate Video | Technology › Display & Graphics | |
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| S/N | Serial Number | Business › Business Terms | |
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| S/N | Signal-to-Noise | Academic & Science › Economics | |
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| S/N | Supernatant | Academic & Science › Chemistry | |
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| S/o | Son of | Academic & Science › Language & Linguistics | |
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| S/O | Sold-Out | Business › Business Terms | |
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| S/O | Shout-Out | Miscellaneous › Chat & Messaging | |
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| S/O | Shipping Order | Business › Trade | |
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| S/O | Significant Other | Miscellaneous › Chat & Messaging | |
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| S/O | Security Officer | Business › Job Titles | |
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