1. Tendency to fall; the feebleness of old age; senility

Derived forms: caducities

• bird's-foot violet
• bird's-nest fungus
• bird-footed dinosaur
• bird-on-the-wing
• bird-scarer
• birdbath
• birdbrain
• birdbrained
• birdcage
• birdcage mask
• birdcall
• birder
• birdfeeder
• birdhouse
• birdie
• birdlike
• birdlime
• birdnest
• birdnesting
• birdseed
• birdseed grass
• birdsong
• birdwatch
• birefringence
• birefringent