indefinable /in-di-fīˈnə-bl/

1. That cannot be defined
2. Hard to identify or describe

• phytonutrients
• phytopathological
• phytopathologist
• phytopathologists
• phytopathology
• phytophagic
• phytophagous
• phytoplankton
• phytoplanktons
• phytoremediation
• phytoses
• phytosis
• phytosterol
• phytosterols
• phytotomies
• phytotomist
• phytotomists
• phytotomy
• phytotoxic
• phytotoxicities
• phytotoxicity
• phytotoxin
• phytotoxins
• phytotron
• phytotrons