Difference between S and Siemens

S

Part of speech: noun

Definition: The nineteenth letter of the English alphabet. The nineteenth in a list. (Synonyms: 19, XIX)

Part of speech: abbreviation

Definition: abbreviation for the scruple (the apothecaries' system unit of mass)

Part of speech: symbol

Definition: A symbol of the International Phonetic Alphabet (IPA), representing a voiceless alveolar fricative.

Siemens

Part of speech: noun

Definition: In the International System of Units, the derived unit of electrical conductance; the electric conductance in a body that has a resistance of one ohm. Symbol: S