1. Acting by absorption through the skin
   - endermic

See also: skin

• genus Sundacarpus
• genus Suricata
• genus Surnia
• genus Sus
• genus Swainsona
• genus Swertia
• genus Swietinia
• genus Sylvilagus
• genus Symphalangus
• genus Symphoricarpos
• genus Symphytum
• genus Symplocarpus
• genus Symplocus
• genus Synagrops
• genus Synanceja
• genus Synaptomys
• genus Synchytrium
• genus Synercus
• genus Syngnathus
• genus Syngonium
• genus Syringa
• genus Syrrhaptes
• genus Syzygium
• genus Tabernaemontana
• genus Tacca