Unio pearl
noun
A pearl produced by a freshwater mussel.
Origin
Late 19th century.
- figgy
- figgy pudding
- fight
- fight a losing battle
- fightback
- fighter
- fighter-bomber
- fighter jet
- fighter pilot
- fight fire with fire
- fighting
- fighting chair
- fighting chance
- fighting cock
- fighting fish
- fighting fit
- fighting fund
- fighting top
- fighting words
- fight like cat and dog
- fight one's corner
- fight or flight
- fight shy of
- fight someone/thing off
- fight tooth and nail