# What does **S** stand for?

**S** stands for S Sub-Shell (innermost electron subshell)

This definition appears somewhat frequently and is found in the following Acronym Finder categories:

- Science, medicine, engineering, etc.

See other **definitions of S**

- Abbreviation Database Surfer
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- Antisubmarine (US military aircraft designation; as in S-2 Tracker)
- Area of a geometric figure (mathematics)
- As
- Continuous-time complex variable (analogous to Z in discrete-time; electrical engineering)
- Displacement
- Entropy (thermodynamics)
- Fourth Heartbeat Wave
- Franchise Stamp (Scott Catalogue prefix; philately)
- Fresnel Sine Integral
- Onde Seconde (Italian: second wave; seismography)