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

• untrustiness
• untrusting
• untrustworthiness
• untrustworthy
• untrusty
• untruth
• untruthful
• untruthfully
• untruthfulness
• untucked
• untufted
• untune
• untuneful
• unturned
• untutored
• untwine
• untwist
• untwisted
• untying
• untypical
• untypicality
• untypically
• ununbium
• ununderstandably
• ununderstood