用法:
1 (biology 生) very simple form of animal (eg a sea anemone) found in water 水螅体（如海葵）:
Coral is formed by certain types of polyp. 珊瑚是由某些水螅体构成的.

用法:
2 (medical 医) any of several kinds of tumour (eg in the nose) 息肉（如鼻腔中的）.

• fidgety
• fief
• fiend
• fiendish
• fierce
• fig
• figment
• figurative
• figurehead
• figurine
• filament
• filch
• file
• filial
• filibuster
• filigree
• filings
• fillet
• filly
• filter
• filth
• filthy
• finable
• finale
• finch