Browse the Concise Encyclopedia
- spanish language
- spanish main
- spanish moss
- spanish netherlands
- spanish succession, war of the
- spanish-american war
- spark plug
- sparrow
- sparrow hawk
- sparta
- spartacists
- spatial disorientation
- spearmint
- special education
- special effects
- special olympics
- speciation
- specie circular
- species
- specific gravity
- specific heat
- spectacled bear
- spectator, the
- spectrochemical analysis
- spectrometer
- spectrophotometry
- spectroscopy
- spectrum
- speech
- speech act theory
- speech recognition
- speech synthesis
- speech therapy
- speed skating
- spelling and grammar checkers
- spelman college
- spelt
- sperm
- sperm whale
- sphalerite
- sphere
- sphere of influence
- spherical coordinate system
- sphinx
- sphynx cat
- spice and herb
- spicebush
- spider
- spider crab
- spider mite
- spider monkey
- spider plant
- spiderwort
- spiegel, der
- spin
- spinach
- spinal cord
- spindle and whorl
- spinel
- spinning
- spinning jenny
- spinning mule
- spinning wheel
- spire
- spirea
- spirillum
- spiritual
- spiritualism
- spirochete
- spirulina
- spitfire
- spitsbergen
- spittlebug
- spitz
- spleen
- split
- spoils system
- sponge
- spoonbill
- spoonerism
- spore
- sporophyte
- sports and games
- sports medicine
- sports-car racing
- sprat
- spratly islands
- spraying and dusting
- spreadsheet
- spring
- spring and autumn period
- spring balance
- spring peeper
- springbok
- springfield armory
- springfield rifle
- spruce
- spruce budworm
- sprung rhythm
- spurge