pentad /penˈtad/

1. A set of five things
2. A period of five years or five days
3. An atom, element or radical with a combining power of five

pentadˈic adjective

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