ballon d'essai /ba-lɔ̃ de-sāˈ/ (French)

1. An experimental balloon
2. A feeler or preliminary sounding of opinion

• bilingually
• bilinguist
• bilinguists
• bilious
• biliously
• biliousness
• biliousnesses
• bilirubin
• bilirubins
• biliteral
• biliverdin
• biliverdins
• bilk
• bilked
• bilker
• bilkers
• bilking
• bilks
• bill
• Bill
• aviators
• aviatress
• aviatresses
• aviatrices
• aviatrix