- supernumerary tooth
- stegosaur
- suint
- small arms
- salt depletion
- silver iodide
- spacewards
- swedish meatball
- sir george paget thomson
- sir matthew flinders
- smith_noguchi medium
- statre variable
- stepdaughter
- systemic poison
- systemic vein
- somatic embryo
- systemic acidifier
- systemic acidosis
- systemic antacid
- sodium pyrophosphate
- sodium tripolyphosphate
- sacculated stomach
- sorbefacient
- steel_wool pad
- spinning jenny
- small_particle pollution
- sophistic
- samuel wilder
- sir bernard lovell
- sir charles leonard woolley
- saddle shaped anaesthesia
- slate pencil
- speckled rattlesnake
- Sistrurus catenatus
- senile cortical devastation
- strain point
- sonic depth finder
- soluble casein
- subclass discomycetes
- satellite coverage
- succinic_dehydrogenase
- sir alan hodgkin
- Sango
- sternothyrodideus
- spheno_occipital synchondrosis
- sphenodon punctatus
- strassen algorithm
- shotput
- shalom asch
- salyut