- Schläfli graph
- Schläfli integral
- Schläfli integral representation
- Schläfli modular form
- Schläfli polynomial
- Schläfli sixfold
- Schläfli symbol
- Schlüter crater
- Schl⍥milch
- Schl⍥milch criterion
- Schl⍥milch function
- Schl⍥milch remainder
- Schl⍥milch series
- Schmallenberg virus disease
- Schmetterer
- Schmid
- Schmid nilpotent orbit theorem
- Schmidt
- Schmidt aplanatic camera
- Schmidt, Brian Paul
- Schmidt camera
- Schmidt-Cassegrain configuration
- Schmidt-Cassegrain telescope
- Schmidt correcting plate
- Schmidt corrector