1. The doctrine of vital forces or energy 
2. The branch of biology which treats of the active vital phenomena of organisms; - opposed to biostatics

Encyclopedia: Biodynamics

• genus Syrrhaptes
• genus Syzygium
• genus Tabernaemontana
• genus Tacca
• genus Tachyglossus
• genus Tachypleus
• genus Tadarida
• genus Tadorna
• genus Taenia
• genus Tagetes
• genus Talinum
• genus Tamandua
• genus Tamarindus
• genus Tamarix
• genus Tamias
• genus Tamiasciurus
• genus Tamus
• genus Tanacetum
• genus Tantilla
• genus Tapirus
• genus Taraktagenos
• genus Taraktogenos
• genus Taraxacum
• genus Taricha
• genus Tarpon