1. Arising or occurring within a species; involving the members of one species
   - intraspecific

Antonym: interspecies

• theory of evolution
• theory of games
• theory of gravitation
• theory of gravity
• theory of indicators
• theory of inheritance
• theory of organic evolution
• theory of preformation
• theory of probability
• theory of punctuated equilibrium
• theory of relativity
• theory-based
• theosophical
• theosophism
• theosophist
• theosophy
• theoterrorism
• therapeutic
• therapeutic abortion
• therapeutic cloning
• therapeutic rehabilitation
• therapeutical
• therapeutically
• therapeutics
• Theraphosidae