1. Mouth-like opening in a sponge through which water is expelled
   - osculum

Derived forms: oscules

• basilar membrane
• basilary
• basileus
• basilic vein
• basilica
• basilican
• Basilicata
• Basiliscus
• basilisk
• basin
• basinal
• basined
• basinet
• basinful
• basipetal
• basis
• basiscopic
• basivertebral vein
• bask
• basket
• basket ash
• basket case
• basket fern
• basket fish
• basket flower