stephanotis
Woody climbing plants of the genus Stephanotis, especially S. floribunda
of Madagascar, cultivated for its showy fragrant white flowers.

staphisagria (stavesacre)
Eurasian plant of the genus Delphinium (D. staphisagria). Ripe seeds of
the stavesacre contain delphinine, are violently emetic and carthartic,
and have been used to kill head lice called also staphisagria

steppage
Peculiar gait seen in neuritis of the peroneal nerve and in tabes
dorsalis; high stepping to allow the drooping foot and toes to clear the
ground.

stertorous
Harsh snoring or gasping sound.

stevia
Plant of the genus Stevia or Piqueria, having white or purplish
flowers.

stiletto
Small dagger with a slender, tapering blade. Small, sharp-pointed
instrument used for making eyelet holes in needlework.

stillingia
Genus of widely distributed herbs and shrubs (family Euphorbiaceae). The
dried root of a plant of the genus Stillingia (S. sylvatica) was
formerly used as a diuretic, and laxative.