biconcave /bī-konˈkāv/

Concave on both sides

• bucks' parties
• buck's party
• bucks party
• bucks' party
• buckteeth
• buckthorn
• buckthorns
• bucktooth
• bucktoothed
• baser
• base rate
• base rates
• base ring
• base rings
• baserunner
• baserunners
• bases
• base-spirited
• basest
• base station
• base stations
• base substitution
• base unit
• base units
• BASF